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Finding the Fourth Proportional to 72,531.90, 108,840.96 and 39,251.28

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Solution

The fourth proportional to 72,531.90, 108,840.96 and 39,251.28 is: 58,900.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,531.90 : 108,840.96 = 39,251.28 : x
  2. Step 2: Convert to fraction form
    72,531.90/108,840.96 = 39,251.28/x
  3. Step 3: Cross multiply
    72,531.90x = 108,840.96 × 39,251.28
  4. Step 4: Simplify right side
    72,531.90x = 4,272,146,996.43
  5. Step 5: Solve for x
    x = 4,272,146,996.43/72,531.90
  6. Step 6: Final answer
    x = 58,900.25

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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.