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Finding the Fourth Proportional to 178,417.20, 267,625.80 and 143,425.20

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Solution

The fourth proportional to 178,417.20, 267,625.80 and 143,425.20 is: 215,137.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,417.20 : 267,625.80 = 143,425.20 : x
  2. Step 2: Convert to fraction form
    178,417.20/267,625.80 = 143,425.20/x
  3. Step 3: Cross multiply
    178,417.20x = 267,625.80 × 143,425.20
  4. Step 4: Simplify right side
    178,417.20x = 38,384,283,890.16
  5. Step 5: Solve for x
    x = 38,384,283,890.16/178,417.20
  6. Step 6: Final answer
    x = 215,137.80

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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.