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Finding the Fourth Proportional to 84,635.88, 126,966.13 and 45,171.47

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Solution

The fourth proportional to 84,635.88, 126,966.13 and 45,171.47 is: 67,763.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,635.88 : 126,966.13 = 45,171.47 : x
  2. Step 2: Convert to fraction form
    84,635.88/126,966.13 = 45,171.47/x
  3. Step 3: Cross multiply
    84,635.88x = 126,966.13 × 45,171.47
  4. Step 4: Simplify right side
    84,635.88x = 5,735,245,871.62
  5. Step 5: Solve for x
    x = 5,735,245,871.62/84,635.88
  6. Step 6: Final answer
    x = 67,763.76

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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.