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Finding the Fourth Proportional to 71,364.87, 98,479.26 and 39,531.47

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Solution

The fourth proportional to 71,364.87, 98,479.26 and 39,531.47 is: 54,551.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,364.87 : 98,479.26 = 39,531.47 : x
  2. Step 2: Convert to fraction form
    71,364.87/98,479.26 = 39,531.47/x
  3. Step 3: Cross multiply
    71,364.87x = 98,479.26 × 39,531.47
  4. Step 4: Simplify right side
    71,364.87x = 3,893,029,419.92
  5. Step 5: Solve for x
    x = 3,893,029,419.92/71,364.87
  6. Step 6: Final answer
    x = 54,551.06

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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.