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Finding the Fourth Proportional to 71,356.17, 106,863.74 and 39,687.57

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Solution

The fourth proportional to 71,356.17, 106,863.74 and 39,687.57 is: 59,436.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,356.17 : 106,863.74 = 39,687.57 : x
  2. Step 2: Convert to fraction form
    71,356.17/106,863.74 = 39,687.57/x
  3. Step 3: Cross multiply
    71,356.17x = 106,863.74 × 39,687.57
  4. Step 4: Simplify right side
    71,356.17x = 4,241,162,112.10
  5. Step 5: Solve for x
    x = 4,241,162,112.10/71,356.17
  6. Step 6: Final answer
    x = 59,436.51

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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.