Home / 129,590.43-178,894.83-91,381.11

Finding the Fourth Proportional to 129,590.43, 178,894.83 and 91,381.11

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Solution

The fourth proportional to 129,590.43, 178,894.83 and 91,381.11 is: 126,148.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,590.43 : 178,894.83 = 91,381.11 : x
  2. Step 2: Convert to fraction form
    129,590.43/178,894.83 = 91,381.11/x
  3. Step 3: Cross multiply
    129,590.43x = 178,894.83 × 91,381.11
  4. Step 4: Simplify right side
    129,590.43x = 16,347,608,138.66
  5. Step 5: Solve for x
    x = 16,347,608,138.66/129,590.43
  6. Step 6: Final answer
    x = 126,148.27

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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.