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Finding the Fourth Proportional to 78,757.92, 117,634.85 and 71,249.96

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Solution

The fourth proportional to 78,757.92, 117,634.85 and 71,249.96 is: 106,420.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,757.92 : 117,634.85 = 71,249.96 : x
  2. Step 2: Convert to fraction form
    78,757.92/117,634.85 = 71,249.96/x
  3. Step 3: Cross multiply
    78,757.92x = 117,634.85 × 71,249.96
  4. Step 4: Simplify right side
    78,757.92x = 8,381,478,357.11
  5. Step 5: Solve for x
    x = 8,381,478,357.11/78,757.92
  6. Step 6: Final answer
    x = 106,420.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.