Home / 281,105.18-387,928.20-153,778.04

Finding the Fourth Proportional to 281,105.18, 387,928.20 and 153,778.04

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Solution

The fourth proportional to 281,105.18, 387,928.20 and 153,778.04 is: 212,215.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,105.18 : 387,928.20 = 153,778.04 : x
  2. Step 2: Convert to fraction form
    281,105.18/387,928.20 = 153,778.04/x
  3. Step 3: Cross multiply
    281,105.18x = 387,928.20 × 153,778.04
  4. Step 4: Simplify right side
    281,105.18x = 59,654,836,317.09
  5. Step 5: Solve for x
    x = 59,654,836,317.09/281,105.18
  6. Step 6: Final answer
    x = 212,215.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.