Home / 128,535.28-177,382.44-71,945.20

Finding the Fourth Proportional to 128,535.28, 177,382.44 and 71,945.20

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Solution

The fourth proportional to 128,535.28, 177,382.44 and 71,945.20 is: 99,286.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,535.28 : 177,382.44 = 71,945.20 : x
  2. Step 2: Convert to fraction form
    128,535.28/177,382.44 = 71,945.20/x
  3. Step 3: Cross multiply
    128,535.28x = 177,382.44 × 71,945.20
  4. Step 4: Simplify right side
    128,535.28x = 12,761,815,122.29
  5. Step 5: Solve for x
    x = 12,761,815,122.29/128,535.28
  6. Step 6: Final answer
    x = 99,286.48

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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.