Home / 129,561.25-178,839.27-75,863.53

Finding the Fourth Proportional to 129,561.25, 178,839.27 and 75,863.53

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Solution

The fourth proportional to 129,561.25, 178,839.27 and 75,863.53 is: 104,717.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,561.25 : 178,839.27 = 75,863.53 : x
  2. Step 2: Convert to fraction form
    129,561.25/178,839.27 = 75,863.53/x
  3. Step 3: Cross multiply
    129,561.25x = 178,839.27 × 75,863.53
  4. Step 4: Simplify right side
    129,561.25x = 13,567,378,324.82
  5. Step 5: Solve for x
    x = 13,567,378,324.82/129,561.25
  6. Step 6: Final answer
    x = 104,717.87

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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.