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Finding the Fourth Proportional to 45,390.80, 68,086.20 and 30,645.20

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Solution

The fourth proportional to 45,390.80, 68,086.20 and 30,645.20 is: 45,967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,390.80 : 68,086.20 = 30,645.20 : x
  2. Step 2: Convert to fraction form
    45,390.80/68,086.20 = 30,645.20/x
  3. Step 3: Cross multiply
    45,390.80x = 68,086.20 × 30,645.20
  4. Step 4: Simplify right side
    45,390.80x = 2,086,515,216.24
  5. Step 5: Solve for x
    x = 2,086,515,216.24/45,390.80
  6. Step 6: Final answer
    x = 45,967.80

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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.