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Finding the Fourth Proportional to 81,079.92, 121,804.36 and 58,659.76

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Solution

The fourth proportional to 81,079.92, 121,804.36 and 58,659.76 is: 88,123.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,079.92 : 121,804.36 = 58,659.76 : x
  2. Step 2: Convert to fraction form
    81,079.92/121,804.36 = 58,659.76/x
  3. Step 3: Cross multiply
    81,079.92x = 121,804.36 × 58,659.76
  4. Step 4: Simplify right side
    81,079.92x = 7,145,014,524.55
  5. Step 5: Solve for x
    x = 7,145,014,524.55/81,079.92
  6. Step 6: Final answer
    x = 88,123.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.