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Finding the Fourth Proportional to 99,740.70, 149,611.05 and 91,575.90

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Solution

The fourth proportional to 99,740.70, 149,611.05 and 91,575.90 is: 137,363.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,740.70 : 149,611.05 = 91,575.90 : x
  2. Step 2: Convert to fraction form
    99,740.70/149,611.05 = 91,575.90/x
  3. Step 3: Cross multiply
    99,740.70x = 149,611.05 × 91,575.90
  4. Step 4: Simplify right side
    99,740.70x = 13,700,766,553.70
  5. Step 5: Solve for x
    x = 13,700,766,553.70/99,740.70
  6. Step 6: Final answer
    x = 137,363.85

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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.