Home / 271,921.12-407,889.72-129,781.37

Finding the Fourth Proportional to 271,921.12, 407,889.72 and 129,781.37

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Solution

The fourth proportional to 271,921.12, 407,889.72 and 129,781.37 is: 194,675.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,921.12 : 407,889.72 = 129,781.37 : x
  2. Step 2: Convert to fraction form
    271,921.12/407,889.72 = 129,781.37/x
  3. Step 3: Cross multiply
    271,921.12x = 407,889.72 × 129,781.37
  4. Step 4: Simplify right side
    271,921.12x = 52,936,487,690.24
  5. Step 5: Solve for x
    x = 52,936,487,690.24/271,921.12
  6. Step 6: Final answer
    x = 194,675.90

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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.