Home / 281,279.10-421,864.86-84,287.10

Finding the Fourth Proportional to 281,279.10, 421,864.86 and 84,287.10

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Solution

The fourth proportional to 281,279.10, 421,864.86 and 84,287.10 is: 126,414.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,279.10 : 421,864.86 = 84,287.10 : x
  2. Step 2: Convert to fraction form
    281,279.10/421,864.86 = 84,287.10/x
  3. Step 3: Cross multiply
    281,279.10x = 421,864.86 × 84,287.10
  4. Step 4: Simplify right side
    281,279.10x = 35,557,765,641.31
  5. Step 5: Solve for x
    x = 35,557,765,641.31/281,279.10
  6. Step 6: Final answer
    x = 126,414.53

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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.