Home / 87,782.90-121,139.52-47,495.78

Finding the Fourth Proportional to 87,782.90, 121,139.52 and 47,495.78

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Solution

The fourth proportional to 87,782.90, 121,139.52 and 47,495.78 is: 65,543.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,782.90 : 121,139.52 = 47,495.78 : x
  2. Step 2: Convert to fraction form
    87,782.90/121,139.52 = 47,495.78/x
  3. Step 3: Cross multiply
    87,782.90x = 121,139.52 × 47,495.78
  4. Step 4: Simplify right side
    87,782.90x = 5,753,615,385.53
  5. Step 5: Solve for x
    x = 5,753,615,385.53/87,782.90
  6. Step 6: Final answer
    x = 65,543.70

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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.