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Finding the Fourth Proportional to 80,561.72, 120,718.38 and 43,126.76

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Solution

The fourth proportional to 80,561.72, 120,718.38 and 43,126.76 is: 64,623.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,561.72 : 120,718.38 = 43,126.76 : x
  2. Step 2: Convert to fraction form
    80,561.72/120,718.38 = 43,126.76/x
  3. Step 3: Cross multiply
    80,561.72x = 120,718.38 × 43,126.76
  4. Step 4: Simplify right side
    80,561.72x = 5,206,192,601.85
  5. Step 5: Solve for x
    x = 5,206,192,601.85/80,561.72
  6. Step 6: Final answer
    x = 64,623.65

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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.