Home / 128,877.16-177,841.38-71,519.44

Finding the Fourth Proportional to 128,877.16, 177,841.38 and 71,519.44

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Solution

The fourth proportional to 128,877.16, 177,841.38 and 71,519.44 is: 98,691.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,877.16 : 177,841.38 = 71,519.44 : x
  2. Step 2: Convert to fraction form
    128,877.16/177,841.38 = 71,519.44/x
  3. Step 3: Cross multiply
    128,877.16x = 177,841.38 × 71,519.44
  4. Step 4: Simplify right side
    128,877.16x = 12,719,115,906.43
  5. Step 5: Solve for x
    x = 12,719,115,906.43/128,877.16
  6. Step 6: Final answer
    x = 98,691.78

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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.