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Finding the Fourth Proportional to 57,385.44, 86,073.30 and 19,935.90

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Solution

The fourth proportional to 57,385.44, 86,073.30 and 19,935.90 is: 29,902.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,385.44 : 86,073.30 = 19,935.90 : x
  2. Step 2: Convert to fraction form
    57,385.44/86,073.30 = 19,935.90/x
  3. Step 3: Cross multiply
    57,385.44x = 86,073.30 × 19,935.90
  4. Step 4: Simplify right side
    57,385.44x = 1,715,948,701.47
  5. Step 5: Solve for x
    x = 1,715,948,701.47/57,385.44
  6. Step 6: Final answer
    x = 29,902.16

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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.