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Finding the Fourth Proportional to 87,791.40, 121,151.28 and 47,504.28

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Solution

The fourth proportional to 87,791.40, 121,151.28 and 47,504.28 is: 65,555.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,791.40 : 121,151.28 = 47,504.28 : x
  2. Step 2: Convert to fraction form
    87,791.40/121,151.28 = 47,504.28/x
  3. Step 3: Cross multiply
    87,791.40x = 121,151.28 × 47,504.28
  4. Step 4: Simplify right side
    87,791.40x = 5,755,204,327.48
  5. Step 5: Solve for x
    x = 5,755,204,327.48/87,791.40
  6. Step 6: Final answer
    x = 65,555.45

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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.