Home / 128,338.52-177,104.22-71,755.16

Finding the Fourth Proportional to 128,338.52, 177,104.22 and 71,755.16

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Solution

The fourth proportional to 128,338.52, 177,104.22 and 71,755.16 is: 99,020.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,338.52 : 177,104.22 = 71,755.16 : x
  2. Step 2: Convert to fraction form
    128,338.52/177,104.22 = 71,755.16/x
  3. Step 3: Cross multiply
    128,338.52x = 177,104.22 × 71,755.16
  4. Step 4: Simplify right side
    128,338.52x = 12,708,141,642.78
  5. Step 5: Solve for x
    x = 12,708,141,642.78/128,338.52
  6. Step 6: Final answer
    x = 99,020.48

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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.