Home / 129,249.78-178,500.66-115,160.90

Finding the Fourth Proportional to 129,249.78, 178,500.66 and 115,160.90

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Solution

The fourth proportional to 129,249.78, 178,500.66 and 115,160.90 is: 159,043.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,249.78 : 178,500.66 = 115,160.90 : x
  2. Step 2: Convert to fraction form
    129,249.78/178,500.66 = 115,160.90/x
  3. Step 3: Cross multiply
    129,249.78x = 178,500.66 × 115,160.90
  4. Step 4: Simplify right side
    129,249.78x = 20,556,296,656.19
  5. Step 5: Solve for x
    x = 20,556,296,656.19/129,249.78
  6. Step 6: Final answer
    x = 159,043.18

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1.5x scale

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.