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Finding the Fourth Proportional to 80,319.54, 120,323.79 and 38,795.70

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Solution

The fourth proportional to 80,319.54, 120,323.79 and 38,795.70 is: 58,118.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,319.54 : 120,323.79 = 38,795.70 : x
  2. Step 2: Convert to fraction form
    80,319.54/120,323.79 = 38,795.70/x
  3. Step 3: Cross multiply
    80,319.54x = 120,323.79 × 38,795.70
  4. Step 4: Simplify right side
    80,319.54x = 4,668,045,659.70
  5. Step 5: Solve for x
    x = 4,668,045,659.70/80,319.54
  6. Step 6: Final answer
    x = 58,118.43

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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.