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Finding the Fourth Proportional to 112,780.90, 155,654.22 and 65,024.92

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Solution

The fourth proportional to 112,780.90, 155,654.22 and 65,024.92 is: 89,743.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,780.90 : 155,654.22 = 65,024.92 : x
  2. Step 2: Convert to fraction form
    112,780.90/155,654.22 = 65,024.92/x
  3. Step 3: Cross multiply
    112,780.90x = 155,654.22 × 65,024.92
  4. Step 4: Simplify right side
    112,780.90x = 10,121,403,203.16
  5. Step 5: Solve for x
    x = 10,121,403,203.16/112,780.90
  6. Step 6: Final answer
    x = 89,743.95

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1.5x scale

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.