Home / 128,151.27-176,843.12-71,561.43

Finding the Fourth Proportional to 128,151.27, 176,843.12 and 71,561.43

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Solution

The fourth proportional to 128,151.27, 176,843.12 and 71,561.43 is: 98,751.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,151.27 : 176,843.12 = 71,561.43 : x
  2. Step 2: Convert to fraction form
    128,151.27/176,843.12 = 71,561.43/x
  3. Step 3: Cross multiply
    128,151.27x = 176,843.12 × 71,561.43
  4. Step 4: Simplify right side
    128,151.27x = 12,655,146,195.05
  5. Step 5: Solve for x
    x = 12,655,146,195.05/128,151.27
  6. Step 6: Final answer
    x = 98,751.63

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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.