Home / 128,608.20-177,479.28-71,251.25

Finding the Fourth Proportional to 128,608.20, 177,479.28 and 71,251.25

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Solution

The fourth proportional to 128,608.20, 177,479.28 and 71,251.25 is: 98,326.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,608.20 : 177,479.28 = 71,251.25 : x
  2. Step 2: Convert to fraction form
    128,608.20/177,479.28 = 71,251.25/x
  3. Step 3: Cross multiply
    128,608.20x = 177,479.28 × 71,251.25
  4. Step 4: Simplify right side
    128,608.20x = 12,645,619,661.70
  5. Step 5: Solve for x
    x = 12,645,619,661.70/128,608.20
  6. Step 6: Final answer
    x = 98,326.70

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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.