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Finding the Fourth Proportional to 99,180.70, 136,869.20 and 54,468.70

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Solution

The fourth proportional to 99,180.70, 136,869.20 and 54,468.70 is: 75,166.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,180.70 : 136,869.20 = 54,468.70 : x
  2. Step 2: Convert to fraction form
    99,180.70/136,869.20 = 54,468.70/x
  3. Step 3: Cross multiply
    99,180.70x = 136,869.20 × 54,468.70
  4. Step 4: Simplify right side
    99,180.70x = 7,455,087,394.04
  5. Step 5: Solve for x
    x = 7,455,087,394.04/99,180.70
  6. Step 6: Final answer
    x = 75,166.71

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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.