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Finding the Fourth Proportional to 132,751.92, 183,113.96 and 78,996.81

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Solution

The fourth proportional to 132,751.92, 183,113.96 and 78,996.81 is: 108,965.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,751.92 : 183,113.96 = 78,996.81 : x
  2. Step 2: Convert to fraction form
    132,751.92/183,113.96 = 78,996.81/x
  3. Step 3: Cross multiply
    132,751.92x = 183,113.96 × 78,996.81
  4. Step 4: Simplify right side
    132,751.92x = 14,465,418,311.48
  5. Step 5: Solve for x
    x = 14,465,418,311.48/132,751.92
  6. Step 6: Final answer
    x = 108,965.79

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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.