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Finding the Fourth Proportional to 71,531.45, 98,711.42 and 39,266.04

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Solution

The fourth proportional to 71,531.45, 98,711.42 and 39,266.04 is: 54,186.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,531.45 : 98,711.42 = 39,266.04 : x
  2. Step 2: Convert to fraction form
    71,531.45/98,711.42 = 39,266.04/x
  3. Step 3: Cross multiply
    71,531.45x = 98,711.42 × 39,266.04
  4. Step 4: Simplify right side
    71,531.45x = 3,876,006,369.85
  5. Step 5: Solve for x
    x = 3,876,006,369.85/71,531.45
  6. Step 6: Final answer
    x = 54,186.05

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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.