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Finding the Fourth Proportional to 84,605.82, 126,909.02 and 21,425.92

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Solution

The fourth proportional to 84,605.82, 126,909.02 and 21,425.92 is: 32,138.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,605.82 : 126,909.02 = 21,425.92 : x
  2. Step 2: Convert to fraction form
    84,605.82/126,909.02 = 21,425.92/x
  3. Step 3: Cross multiply
    84,605.82x = 126,909.02 × 21,425.92
  4. Step 4: Simplify right side
    84,605.82x = 2,719,142,509.80
  5. Step 5: Solve for x
    x = 2,719,142,509.80/84,605.82
  6. Step 6: Final answer
    x = 32,138.95

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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.