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Finding the Fourth Proportional to 89,694.76, 123,778.76 and 51,990.88

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Solution

The fourth proportional to 89,694.76, 123,778.76 and 51,990.88 is: 71,747.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,694.76 : 123,778.76 = 51,990.88 : x
  2. Step 2: Convert to fraction form
    89,694.76/123,778.76 = 51,990.88/x
  3. Step 3: Cross multiply
    89,694.76x = 123,778.76 × 51,990.88
  4. Step 4: Simplify right side
    89,694.76x = 6,435,366,657.71
  5. Step 5: Solve for x
    x = 6,435,366,657.71/89,694.76
  6. Step 6: Final answer
    x = 71,747.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.