Home / 129,447.49-178,545.52-86,405.28

Finding the Fourth Proportional to 129,447.49, 178,545.52 and 86,405.28

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Solution

The fourth proportional to 129,447.49, 178,545.52 and 86,405.28 is: 119,177.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,447.49 : 178,545.52 = 86,405.28 : x
  2. Step 2: Convert to fraction form
    129,447.49/178,545.52 = 86,405.28/x
  3. Step 3: Cross multiply
    129,447.49x = 178,545.52 × 86,405.28
  4. Step 4: Simplify right side
    129,447.49x = 15,427,275,324.33
  5. Step 5: Solve for x
    x = 15,427,275,324.33/129,447.49
  6. Step 6: Final answer
    x = 119,177.86

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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.