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Finding the Fourth Proportional to 28,080,658.30, 42,120,987.45 and 28,080,658.30

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Solution

The fourth proportional to 28,080,658.30, 42,120,987.45 and 28,080,658.30 is: 42,120,987.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080,658.30 : 42,120,987.45 = 28,080,658.30 : x
  2. Step 2: Convert to fraction form
    28,080,658.30/42,120,987.45 = 28,080,658.30/x
  3. Step 3: Cross multiply
    28,080,658.30x = 42,120,987.45 × 28,080,658.30
  4. Step 4: Simplify right side
    28,080,658.30x = 1,182,785,055,842,038.50
  5. Step 5: Solve for x
    x = 1,182,785,055,842,038.50/28,080,658.30
  6. Step 6: Final answer
    x = 42,120,987.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.