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Finding the Fourth Proportional to 100,390.92, 150,613.92 and 81,624.30

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Solution

The fourth proportional to 100,390.92, 150,613.92 and 81,624.30 is: 122,458.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,390.92 : 150,613.92 = 81,624.30 : x
  2. Step 2: Convert to fraction form
    100,390.92/150,613.92 = 81,624.30/x
  3. Step 3: Cross multiply
    100,390.92x = 150,613.92 × 81,624.30
  4. Step 4: Simplify right side
    100,390.92x = 12,293,755,790.26
  5. Step 5: Solve for x
    x = 12,293,755,790.26/100,390.92
  6. Step 6: Final answer
    x = 122,458.84

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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.