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Finding the Fourth Proportional to 100,246.77, 138,404.97 and 89,472.96

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Solution

The fourth proportional to 100,246.77, 138,404.97 and 89,472.96 is: 123,530.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,246.77 : 138,404.97 = 89,472.96 : x
  2. Step 2: Convert to fraction form
    100,246.77/138,404.97 = 89,472.96/x
  3. Step 3: Cross multiply
    100,246.77x = 138,404.97 × 89,472.96
  4. Step 4: Simplify right side
    100,246.77x = 12,383,502,344.61
  5. Step 5: Solve for x
    x = 12,383,502,344.61/100,246.77
  6. Step 6: Final answer
    x = 123,530.19

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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.