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Finding the Fourth Proportional to 99,909.80, 137,873.89 and 54,586.81

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Solution

The fourth proportional to 99,909.80, 137,873.89 and 54,586.81 is: 75,328.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,909.80 : 137,873.89 = 54,586.81 : x
  2. Step 2: Convert to fraction form
    99,909.80/137,873.89 = 54,586.81/x
  3. Step 3: Cross multiply
    99,909.80x = 137,873.89 × 54,586.81
  4. Step 4: Simplify right side
    99,909.80x = 7,526,095,469.40
  5. Step 5: Solve for x
    x = 7,526,095,469.40/99,909.80
  6. Step 6: Final answer
    x = 75,328.90

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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.