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Finding the Fourth Proportional to 86,703.62, 129,850.39 and 73,909.67

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Solution

The fourth proportional to 86,703.62, 129,850.39 and 73,909.67 is: 110,689.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,703.62 : 129,850.39 = 73,909.67 : x
  2. Step 2: Convert to fraction form
    86,703.62/129,850.39 = 73,909.67/x
  3. Step 3: Cross multiply
    86,703.62x = 129,850.39 × 73,909.67
  4. Step 4: Simplify right side
    86,703.62x = 9,597,198,917.41
  5. Step 5: Solve for x
    x = 9,597,198,917.41/86,703.62
  6. Step 6: Final answer
    x = 110,689.72

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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.