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Finding the Fourth Proportional to 99,181.20, 136,869.90 and 54,469.20

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Solution

The fourth proportional to 99,181.20, 136,869.90 and 54,469.20 is: 75,167.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,181.20 : 136,869.90 = 54,469.20 : x
  2. Step 2: Convert to fraction form
    99,181.20/136,869.90 = 54,469.20/x
  3. Step 3: Cross multiply
    99,181.20x = 136,869.90 × 54,469.20
  4. Step 4: Simplify right side
    99,181.20x = 7,455,193,957.08
  5. Step 5: Solve for x
    x = 7,455,193,957.08/99,181.20
  6. Step 6: Final answer
    x = 75,167.41

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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.