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Finding the Fourth Proportional to 87,791.58, 121,152.78 and 47,505.60

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Solution

The fourth proportional to 87,791.58, 121,152.78 and 47,505.60 is: 65,557.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,791.58 : 121,152.78 = 47,505.60 : x
  2. Step 2: Convert to fraction form
    87,791.58/121,152.78 = 47,505.60/x
  3. Step 3: Cross multiply
    87,791.58x = 121,152.78 × 47,505.60
  4. Step 4: Simplify right side
    87,791.58x = 5,755,435,505.57
  5. Step 5: Solve for x
    x = 5,755,435,505.57/87,791.58
  6. Step 6: Final answer
    x = 65,557.94

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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.