Home / 381,945.44-572,716.56-129,139.04

Finding the Fourth Proportional to 381,945.44, 572,716.56 and 129,139.04

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Solution

The fourth proportional to 381,945.44, 572,716.56 and 129,139.04 is: 193,640.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,945.44 : 572,716.56 = 129,139.04 : x
  2. Step 2: Convert to fraction form
    381,945.44/572,716.56 = 129,139.04/x
  3. Step 3: Cross multiply
    381,945.44x = 572,716.56 × 129,139.04
  4. Step 4: Simplify right side
    381,945.44x = 73,960,066,750.50
  5. Step 5: Solve for x
    x = 73,960,066,750.50/381,945.44
  6. Step 6: Final answer
    x = 193,640.40

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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.