Home / 129,182.66-178,286.82-71,827.69

Finding the Fourth Proportional to 129,182.66, 178,286.82 and 71,827.69

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Solution

The fourth proportional to 129,182.66, 178,286.82 and 71,827.69 is: 99,130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,182.66 : 178,286.82 = 71,827.69 : x
  2. Step 2: Convert to fraction form
    129,182.66/178,286.82 = 71,827.69/x
  3. Step 3: Cross multiply
    129,182.66x = 178,286.82 × 71,827.69
  4. Step 4: Simplify right side
    129,182.66x = 12,805,929,546.61
  5. Step 5: Solve for x
    x = 12,805,929,546.61/129,182.66
  6. Step 6: Final answer
    x = 99,130.41

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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.