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Finding the Fourth Proportional to 178,436, 267,757.68 and 79,940

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Solution

The fourth proportional to 178,436, 267,757.68 and 79,940 is: 119,956.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,436 : 267,757.68 = 79,940 : x
  2. Step 2: Convert to fraction form
    178,436/267,757.68 = 79,940/x
  3. Step 3: Cross multiply
    178,436x = 267,757.68 × 79,940
  4. Step 4: Simplify right side
    178,436x = 21,404,548,939.20
  5. Step 5: Solve for x
    x = 21,404,548,939.20/178,436
  6. Step 6: Final answer
    x = 119,956.45

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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.