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Finding the Fourth Proportional to 80,891.52, 111,633.52 and 45,081.20

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Solution

The fourth proportional to 80,891.52, 111,633.52 and 45,081.20 is: 62,213.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,891.52 : 111,633.52 = 45,081.20 : x
  2. Step 2: Convert to fraction form
    80,891.52/111,633.52 = 45,081.20/x
  3. Step 3: Cross multiply
    80,891.52x = 111,633.52 × 45,081.20
  4. Step 4: Simplify right side
    80,891.52x = 5,032,573,041.82
  5. Step 5: Solve for x
    x = 5,032,573,041.82/80,891.52
  6. Step 6: Final answer
    x = 62,213.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.