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Finding the Fourth Proportional to 71,436.78, 98,582.76 and 39,604.98

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Solution

The fourth proportional to 71,436.78, 98,582.76 and 39,604.98 is: 54,654.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,436.78 : 98,582.76 = 39,604.98 : x
  2. Step 2: Convert to fraction form
    71,436.78/98,582.76 = 39,604.98/x
  3. Step 3: Cross multiply
    71,436.78x = 98,582.76 × 39,604.98
  4. Step 4: Simplify right side
    71,436.78x = 3,904,368,238.14
  5. Step 5: Solve for x
    x = 3,904,368,238.14/71,436.78
  6. Step 6: Final answer
    x = 54,654.87

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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.