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Finding the Fourth Proportional to 86,379.40, 129,560.59 and 30,209.14

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Solution

The fourth proportional to 86,379.40, 129,560.59 and 30,209.14 is: 45,310.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,379.40 : 129,560.59 = 30,209.14 : x
  2. Step 2: Convert to fraction form
    86,379.40/129,560.59 = 30,209.14/x
  3. Step 3: Cross multiply
    86,379.40x = 129,560.59 × 30,209.14
  4. Step 4: Simplify right side
    86,379.40x = 3,913,914,001.79
  5. Step 5: Solve for x
    x = 3,913,914,001.79/86,379.40
  6. Step 6: Final answer
    x = 45,310.73

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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.