Home / 129,194.16-178,233.12-78,864

Finding the Fourth Proportional to 129,194.16, 178,233.12 and 78,864

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Solution

The fourth proportional to 129,194.16, 178,233.12 and 78,864 is: 108,798.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,194.16 : 178,233.12 = 78,864 : x
  2. Step 2: Convert to fraction form
    129,194.16/178,233.12 = 78,864/x
  3. Step 3: Cross multiply
    129,194.16x = 178,233.12 × 78,864
  4. Step 4: Simplify right side
    129,194.16x = 14,056,176,775.68
  5. Step 5: Solve for x
    x = 14,056,176,775.68/129,194.16
  6. Step 6: Final answer
    x = 108,798.86

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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.