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Finding the Fourth Proportional to 99,909.70, 149,864.55 and 91,744.90

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Solution

The fourth proportional to 99,909.70, 149,864.55 and 91,744.90 is: 137,617.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,909.70 : 149,864.55 = 91,744.90 : x
  2. Step 2: Convert to fraction form
    99,909.70/149,864.55 = 91,744.90/x
  3. Step 3: Cross multiply
    99,909.70x = 149,864.55 × 91,744.90
  4. Step 4: Simplify right side
    99,909.70x = 13,749,308,153.30
  5. Step 5: Solve for x
    x = 13,749,308,153.30/99,909.70
  6. Step 6: Final answer
    x = 137,617.35

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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.