Home / 285,930.80-428,757.66-86,213.96

Finding the Fourth Proportional to 285,930.80, 428,757.66 and 86,213.96

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Solution

The fourth proportional to 285,930.80, 428,757.66 and 86,213.96 is: 129,279.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,930.80 : 428,757.66 = 86,213.96 : x
  2. Step 2: Convert to fraction form
    285,930.80/428,757.66 = 86,213.96/x
  3. Step 3: Cross multiply
    285,930.80x = 428,757.66 × 86,213.96
  4. Step 4: Simplify right side
    285,930.80x = 36,964,895,748.93
  5. Step 5: Solve for x
    x = 36,964,895,748.93/285,930.80
  6. Step 6: Final answer
    x = 129,279.17

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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.