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Finding the Fourth Proportional to 80,279.92, 120,384.96 and 42,831.64

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Solution

The fourth proportional to 80,279.92, 120,384.96 and 42,831.64 is: 64,228.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,279.92 : 120,384.96 = 42,831.64 : x
  2. Step 2: Convert to fraction form
    80,279.92/120,384.96 = 42,831.64/x
  3. Step 3: Cross multiply
    80,279.92x = 120,384.96 × 42,831.64
  4. Step 4: Simplify right side
    80,279.92x = 5,156,285,268.13
  5. Step 5: Solve for x
    x = 5,156,285,268.13/80,279.92
  6. Step 6: Final answer
    x = 64,228.83

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1.5x scale

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.