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Finding the Fourth Proportional to 87,740.79, 121,081.93 and 47,454.57

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Solution

The fourth proportional to 87,740.79, 121,081.93 and 47,454.57 is: 65,487.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,740.79 : 121,081.93 = 47,454.57 : x
  2. Step 2: Convert to fraction form
    87,740.79/121,081.93 = 47,454.57/x
  3. Step 3: Cross multiply
    87,740.79x = 121,081.93 × 47,454.57
  4. Step 4: Simplify right side
    87,740.79x = 5,745,890,922.92
  5. Step 5: Solve for x
    x = 5,745,890,922.92/87,740.79
  6. Step 6: Final answer
    x = 65,487.11

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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.