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Finding the Fourth Proportional to 80,278.92, 120,383.46 and 42,830.64

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Solution

The fourth proportional to 80,278.92, 120,383.46 and 42,830.64 is: 64,227.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,278.92 : 120,383.46 = 42,830.64 : x
  2. Step 2: Convert to fraction form
    80,278.92/120,383.46 = 42,830.64/x
  3. Step 3: Cross multiply
    80,278.92x = 120,383.46 × 42,830.64
  4. Step 4: Simplify right side
    80,278.92x = 5,156,100,637.21
  5. Step 5: Solve for x
    x = 5,156,100,637.21/80,278.92
  6. Step 6: Final answer
    x = 64,227.33

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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.