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Finding the Fourth Proportional to 71,640.52, 107,461.98 and 40,032.28

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Solution

The fourth proportional to 71,640.52, 107,461.98 and 40,032.28 is: 60,049.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,640.52 : 107,461.98 = 40,032.28 : x
  2. Step 2: Convert to fraction form
    71,640.52/107,461.98 = 40,032.28/x
  3. Step 3: Cross multiply
    71,640.52x = 107,461.98 × 40,032.28
  4. Step 4: Simplify right side
    71,640.52x = 4,301,948,072.71
  5. Step 5: Solve for x
    x = 4,301,948,072.71/71,640.52
  6. Step 6: Final answer
    x = 60,049.09

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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.