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Finding the Fourth Proportional to 81,371.58, 112,217.83 and 55,832.88

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Solution

The fourth proportional to 81,371.58, 112,217.83 and 55,832.88 is: 76,997.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,371.58 : 112,217.83 = 55,832.88 : x
  2. Step 2: Convert to fraction form
    81,371.58/112,217.83 = 55,832.88/x
  3. Step 3: Cross multiply
    81,371.58x = 112,217.83 × 55,832.88
  4. Step 4: Simplify right side
    81,371.58x = 6,265,444,636.25
  5. Step 5: Solve for x
    x = 6,265,444,636.25/81,371.58
  6. Step 6: Final answer
    x = 76,997.95

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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.