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Finding the Fourth Proportional to 71,376.11, 98,494.74 and 39,542.70

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Solution

The fourth proportional to 71,376.11, 98,494.74 and 39,542.70 is: 54,566.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,376.11 : 98,494.74 = 39,542.70 : x
  2. Step 2: Convert to fraction form
    71,376.11/98,494.74 = 39,542.70/x
  3. Step 3: Cross multiply
    71,376.11x = 98,494.74 × 39,542.70
  4. Step 4: Simplify right side
    71,376.11x = 3,894,747,955.40
  5. Step 5: Solve for x
    x = 3,894,747,955.40/71,376.11
  6. Step 6: Final answer
    x = 54,566.55

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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.