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Finding the Fourth Proportional to 129,793.69, 179,081.44 and 76,049.83

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Solution

The fourth proportional to 129,793.69, 179,081.44 and 76,049.83 is: 104,928.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,793.69 : 179,081.44 = 76,049.83 : x
  2. Step 2: Convert to fraction form
    129,793.69/179,081.44 = 76,049.83/x
  3. Step 3: Cross multiply
    129,793.69x = 179,081.44 × 76,049.83
  4. Step 4: Simplify right side
    129,793.69x = 13,619,113,068.16
  5. Step 5: Solve for x
    x = 13,619,113,068.16/129,793.69
  6. Step 6: Final answer
    x = 104,928.93

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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.