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Finding the Fourth Proportional to 129,891.60, 179,228.16 and 73,301.76

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Solution

The fourth proportional to 129,891.60, 179,228.16 and 73,301.76 is: 101,143.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,891.60 : 179,228.16 = 73,301.76 : x
  2. Step 2: Convert to fraction form
    129,891.60/179,228.16 = 73,301.76/x
  3. Step 3: Cross multiply
    129,891.60x = 179,228.16 × 73,301.76
  4. Step 4: Simplify right side
    129,891.60x = 13,137,739,569.56
  5. Step 5: Solve for x
    x = 13,137,739,569.56/129,891.60
  6. Step 6: Final answer
    x = 101,143.87

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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.