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Finding the Fourth Proportional to 71,369.69, 98,490.96 and 39,540.47

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Solution

The fourth proportional to 71,369.69, 98,490.96 and 39,540.47 is: 54,566.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,369.69 : 98,490.96 = 39,540.47 : x
  2. Step 2: Convert to fraction form
    71,369.69/98,490.96 = 39,540.47/x
  3. Step 3: Cross multiply
    71,369.69x = 98,490.96 × 39,540.47
  4. Step 4: Simplify right side
    71,369.69x = 3,894,378,356.70
  5. Step 5: Solve for x
    x = 3,894,378,356.70/71,369.69
  6. Step 6: Final answer
    x = 54,566.28

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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.