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Finding the Fourth Proportional to 71,508.72, 98,680.76 and 39,677.08

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Solution

The fourth proportional to 71,508.72, 98,680.76 and 39,677.08 is: 54,753.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,508.72 : 98,680.76 = 39,677.08 : x
  2. Step 2: Convert to fraction form
    71,508.72/98,680.76 = 39,677.08/x
  3. Step 3: Cross multiply
    71,508.72x = 98,680.76 × 39,677.08
  4. Step 4: Simplify right side
    71,508.72x = 3,915,364,408.98
  5. Step 5: Solve for x
    x = 3,915,364,408.98/71,508.72
  6. Step 6: Final answer
    x = 54,753.66

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1.5x scale

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.