Home / 129,432.26-178,573.68-75,679.20

Finding the Fourth Proportional to 129,432.26, 178,573.68 and 75,679.20

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Solution

The fourth proportional to 129,432.26, 178,573.68 and 75,679.20 is: 104,412.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,432.26 : 178,573.68 = 75,679.20 : x
  2. Step 2: Convert to fraction form
    129,432.26/178,573.68 = 75,679.20/x
  3. Step 3: Cross multiply
    129,432.26x = 178,573.68 × 75,679.20
  4. Step 4: Simplify right side
    129,432.26x = 13,514,313,243.46
  5. Step 5: Solve for x
    x = 13,514,313,243.46/129,432.26
  6. Step 6: Final answer
    x = 104,412.25

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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.