Home / 128,542.33-177,391.38-74,836.90

Finding the Fourth Proportional to 128,542.33, 177,391.38 and 74,836.90

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Solution

The fourth proportional to 128,542.33, 177,391.38 and 74,836.90 is: 103,276.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,542.33 : 177,391.38 = 74,836.90 : x
  2. Step 2: Convert to fraction form
    128,542.33/177,391.38 = 74,836.90/x
  3. Step 3: Cross multiply
    128,542.33x = 177,391.38 × 74,836.90
  4. Step 4: Simplify right side
    128,542.33x = 13,275,420,965.92
  5. Step 5: Solve for x
    x = 13,275,420,965.92/128,542.33
  6. Step 6: Final answer
    x = 103,276.65

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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.