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Finding the Fourth Proportional to 129,059.20, 193,435.20 and 54,179.20

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Solution

The fourth proportional to 129,059.20, 193,435.20 and 54,179.20 is: 81,204.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,059.20 : 193,435.20 = 54,179.20 : x
  2. Step 2: Convert to fraction form
    129,059.20/193,435.20 = 54,179.20/x
  3. Step 3: Cross multiply
    129,059.20x = 193,435.20 × 54,179.20
  4. Step 4: Simplify right side
    129,059.20x = 10,480,164,387.84
  5. Step 5: Solve for x
    x = 10,480,164,387.84/129,059.20
  6. Step 6: Final answer
    x = 81,204.32

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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.