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Finding the Fourth Proportional to 90,289.80, 135,642.24 and 63,696.96

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Solution

The fourth proportional to 90,289.80, 135,642.24 and 63,696.96 is: 95,691.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,289.80 : 135,642.24 = 63,696.96 : x
  2. Step 2: Convert to fraction form
    90,289.80/135,642.24 = 63,696.96/x
  3. Step 3: Cross multiply
    90,289.80x = 135,642.24 × 63,696.96
  4. Step 4: Simplify right side
    90,289.80x = 8,639,998,335.59
  5. Step 5: Solve for x
    x = 8,639,998,335.59/90,289.80
  6. Step 6: Final answer
    x = 95,691.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.