Home / 129,166.11-178,336.20-115,511.79

Finding the Fourth Proportional to 129,166.11, 178,336.20 and 115,511.79

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Solution

The fourth proportional to 129,166.11, 178,336.20 and 115,511.79 is: 159,484.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,166.11 : 178,336.20 = 115,511.79 : x
  2. Step 2: Convert to fraction form
    129,166.11/178,336.20 = 115,511.79/x
  3. Step 3: Cross multiply
    129,166.11x = 178,336.20 × 115,511.79
  4. Step 4: Simplify right side
    129,166.11x = 20,599,933,683.80
  5. Step 5: Solve for x
    x = 20,599,933,683.80/129,166.11
  6. Step 6: Final answer
    x = 159,484.04

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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.