Home / 281,229.12-421,999.20-115,133.76

Finding the Fourth Proportional to 281,229.12, 421,999.20 and 115,133.76

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Solution

The fourth proportional to 281,229.12, 421,999.20 and 115,133.76 is: 172,764.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,229.12 : 421,999.20 = 115,133.76 : x
  2. Step 2: Convert to fraction form
    281,229.12/421,999.20 = 115,133.76/x
  3. Step 3: Cross multiply
    281,229.12x = 421,999.20 × 115,133.76
  4. Step 4: Simplify right side
    281,229.12x = 48,586,354,612.99
  5. Step 5: Solve for x
    x = 48,586,354,612.99/281,229.12
  6. Step 6: Final answer
    x = 172,764.31

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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.