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Finding the Fourth Proportional to 178,633, 267,869.22 and 128,503

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Solution

The fourth proportional to 178,633, 267,869.22 and 128,503 is: 192,696.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,633 : 267,869.22 = 128,503 : x
  2. Step 2: Convert to fraction form
    178,633/267,869.22 = 128,503/x
  3. Step 3: Cross multiply
    178,633x = 267,869.22 × 128,503
  4. Step 4: Simplify right side
    178,633x = 34,421,998,377.66
  5. Step 5: Solve for x
    x = 34,421,998,377.66/178,633
  6. Step 6: Final answer
    x = 192,696.75

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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.