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Finding the Fourth Proportional to 279,139.14, 418,375.17 and 101,438.10

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Solution

The fourth proportional to 279,139.14, 418,375.17 and 101,438.10 is: 152,035.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,139.14 : 418,375.17 = 101,438.10 : x
  2. Step 2: Convert to fraction form
    279,139.14/418,375.17 = 101,438.10/x
  3. Step 3: Cross multiply
    279,139.14x = 418,375.17 × 101,438.10
  4. Step 4: Simplify right side
    279,139.14x = 42,439,182,331.98
  5. Step 5: Solve for x
    x = 42,439,182,331.98/279,139.14
  6. Step 6: Final answer
    x = 152,035.94

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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.