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Finding the Fourth Proportional to 81,849.88, 112,856.22 and 56,020.88

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Solution

The fourth proportional to 81,849.88, 112,856.22 and 56,020.88 is: 77,242.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,849.88 : 112,856.22 = 56,020.88 : x
  2. Step 2: Convert to fraction form
    81,849.88/112,856.22 = 56,020.88/x
  3. Step 3: Cross multiply
    81,849.88x = 112,856.22 × 56,020.88
  4. Step 4: Simplify right side
    81,849.88x = 6,322,304,757.87
  5. Step 5: Solve for x
    x = 6,322,304,757.87/81,849.88
  6. Step 6: Final answer
    x = 77,242.69

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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.