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Finding the Fourth Proportional to 61,929.90, 85,476.90 and 40,711.14

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Solution

The fourth proportional to 61,929.90, 85,476.90 and 40,711.14 is: 56,190.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,929.90 : 85,476.90 = 40,711.14 : x
  2. Step 2: Convert to fraction form
    61,929.90/85,476.90 = 40,711.14/x
  3. Step 3: Cross multiply
    61,929.90x = 85,476.90 × 40,711.14
  4. Step 4: Simplify right side
    61,929.90x = 3,479,862,042.67
  5. Step 5: Solve for x
    x = 3,479,862,042.67/61,929.90
  6. Step 6: Final answer
    x = 56,190.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.