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Finding the Fourth Proportional to 83,472.49, 124,937.71 and 61,280.89

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Solution

The fourth proportional to 83,472.49, 124,937.71 and 61,280.89 is: 91,722.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,472.49 : 124,937.71 = 61,280.89 : x
  2. Step 2: Convert to fraction form
    83,472.49/124,937.71 = 61,280.89/x
  3. Step 3: Cross multiply
    83,472.49x = 124,937.71 × 61,280.89
  4. Step 4: Simplify right side
    83,472.49x = 7,656,294,063.36
  5. Step 5: Solve for x
    x = 7,656,294,063.36/83,472.49
  6. Step 6: Final answer
    x = 91,722.36

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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.