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Finding the Fourth Proportional to 67,635.40, 101,398.12 and 28,221.88

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Solution

The fourth proportional to 67,635.40, 101,398.12 and 28,221.88 is: 42,309.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,635.40 : 101,398.12 = 28,221.88 : x
  2. Step 2: Convert to fraction form
    67,635.40/101,398.12 = 28,221.88/x
  3. Step 3: Cross multiply
    67,635.40x = 101,398.12 × 28,221.88
  4. Step 4: Simplify right side
    67,635.40x = 2,861,645,574.87
  5. Step 5: Solve for x
    x = 2,861,645,574.87/67,635.40
  6. Step 6: Final answer
    x = 42,309.88

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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.