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Finding the Fourth Proportional to 81,318.60, 112,233 and 55,803.96

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Solution

The fourth proportional to 81,318.60, 112,233 and 55,803.96 is: 77,018.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,318.60 : 112,233 = 55,803.96 : x
  2. Step 2: Convert to fraction form
    81,318.60/112,233 = 55,803.96/x
  3. Step 3: Cross multiply
    81,318.60x = 112,233 × 55,803.96
  4. Step 4: Simplify right side
    81,318.60x = 6,263,045,842.68
  5. Step 5: Solve for x
    x = 6,263,045,842.68/81,318.60
  6. Step 6: Final answer
    x = 77,018.61

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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.