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Finding the Fourth Proportional to 63,769.80, 95,634.30 and 21,065.76

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Solution

The fourth proportional to 63,769.80, 95,634.30 and 21,065.76 is: 31,591.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,769.80 : 95,634.30 = 21,065.76 : x
  2. Step 2: Convert to fraction form
    63,769.80/95,634.30 = 21,065.76/x
  3. Step 3: Cross multiply
    63,769.80x = 95,634.30 × 21,065.76
  4. Step 4: Simplify right side
    63,769.80x = 2,014,609,211.57
  5. Step 5: Solve for x
    x = 2,014,609,211.57/63,769.80
  6. Step 6: Final answer
    x = 31,591.90

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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.