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Finding the Fourth Proportional to 99,602.80, 149,404.20 and 89,761.30

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Solution

The fourth proportional to 99,602.80, 149,404.20 and 89,761.30 is: 134,641.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,602.80 : 149,404.20 = 89,761.30 : x
  2. Step 2: Convert to fraction form
    99,602.80/149,404.20 = 89,761.30/x
  3. Step 3: Cross multiply
    99,602.80x = 149,404.20 × 89,761.30
  4. Step 4: Simplify right side
    99,602.80x = 13,410,715,217.46
  5. Step 5: Solve for x
    x = 13,410,715,217.46/99,602.80
  6. Step 6: Final answer
    x = 134,641.95

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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.