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Finding the Fourth Proportional to 99,781.68, 149,217.82 and 74,498.88

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Solution

The fourth proportional to 99,781.68, 149,217.82 and 74,498.88 is: 111,408.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,781.68 : 149,217.82 = 74,498.88 : x
  2. Step 2: Convert to fraction form
    99,781.68/149,217.82 = 74,498.88/x
  3. Step 3: Cross multiply
    99,781.68x = 149,217.82 × 74,498.88
  4. Step 4: Simplify right side
    99,781.68x = 11,116,560,466.04
  5. Step 5: Solve for x
    x = 11,116,560,466.04/99,781.68
  6. Step 6: Final answer
    x = 111,408.83

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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.