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Finding the Fourth Proportional to 178,700.80, 267,820.80 and 136,940.80

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Solution

The fourth proportional to 178,700.80, 267,820.80 and 136,940.80 is: 205,234.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,700.80 : 267,820.80 = 136,940.80 : x
  2. Step 2: Convert to fraction form
    178,700.80/267,820.80 = 136,940.80/x
  3. Step 3: Cross multiply
    178,700.80x = 267,820.80 × 136,940.80
  4. Step 4: Simplify right side
    178,700.80x = 36,675,594,608.64
  5. Step 5: Solve for x
    x = 36,675,594,608.64/178,700.80
  6. Step 6: Final answer
    x = 205,234.64

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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.