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Finding the Fourth Proportional to 81,687.24, 112,731.12 and 45,883.56

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Solution

The fourth proportional to 81,687.24, 112,731.12 and 45,883.56 is: 63,320.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,687.24 : 112,731.12 = 45,883.56 : x
  2. Step 2: Convert to fraction form
    81,687.24/112,731.12 = 45,883.56/x
  3. Step 3: Cross multiply
    81,687.24x = 112,731.12 × 45,883.56
  4. Step 4: Simplify right side
    81,687.24x = 5,172,505,108.39
  5. Step 5: Solve for x
    x = 5,172,505,108.39/81,687.24
  6. Step 6: Final answer
    x = 63,320.85

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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.