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Finding the Fourth Proportional to 84,063.76, 125,723.84 and 74,769.04

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Solution

The fourth proportional to 84,063.76, 125,723.84 and 74,769.04 is: 111,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,063.76 : 125,723.84 = 74,769.04 : x
  2. Step 2: Convert to fraction form
    84,063.76/125,723.84 = 74,769.04/x
  3. Step 3: Cross multiply
    84,063.76x = 125,723.84 × 74,769.04
  4. Step 4: Simplify right side
    84,063.76x = 9,400,250,821.91
  5. Step 5: Solve for x
    x = 9,400,250,821.91/84,063.76
  6. Step 6: Final answer
    x = 111,822.87

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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.