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Finding the Fourth Proportional to 178,439.80, 267,659.70 and 136,449.40

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Solution

The fourth proportional to 178,439.80, 267,659.70 and 136,449.40 is: 204,674.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,439.80 : 267,659.70 = 136,449.40 : x
  2. Step 2: Convert to fraction form
    178,439.80/267,659.70 = 136,449.40/x
  3. Step 3: Cross multiply
    178,439.80x = 267,659.70 × 136,449.40
  4. Step 4: Simplify right side
    178,439.80x = 36,522,005,469.18
  5. Step 5: Solve for x
    x = 36,522,005,469.18/178,439.80
  6. Step 6: Final answer
    x = 204,674.10

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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.