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Finding the Fourth Proportional to 84,857.90, 127,287.20 and 28,698.30

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Solution

The fourth proportional to 84,857.90, 127,287.20 and 28,698.30 is: 43,047.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,857.90 : 127,287.20 = 28,698.30 : x
  2. Step 2: Convert to fraction form
    84,857.90/127,287.20 = 28,698.30/x
  3. Step 3: Cross multiply
    84,857.90x = 127,287.20 × 28,698.30
  4. Step 4: Simplify right side
    84,857.90x = 3,652,926,251.76
  5. Step 5: Solve for x
    x = 3,652,926,251.76/84,857.90
  6. Step 6: Final answer
    x = 43,047.57

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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.