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Finding the Fourth Proportional to 81,279.92, 121,889.63 and 27,956.93

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Solution

The fourth proportional to 81,279.92, 121,889.63 and 27,956.93 is: 41,924.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,279.92 : 121,889.63 = 27,956.93 : x
  2. Step 2: Convert to fraction form
    81,279.92/121,889.63 = 27,956.93/x
  3. Step 3: Cross multiply
    81,279.92x = 121,889.63 × 27,956.93
  4. Step 4: Simplify right side
    81,279.92x = 3,407,659,104.40
  5. Step 5: Solve for x
    x = 3,407,659,104.40/81,279.92
  6. Step 6: Final answer
    x = 41,924.98

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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.