Home / 128,944.80-177,934.91-71,579.61

Finding the Fourth Proportional to 128,944.80, 177,934.91 and 71,579.61

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Solution

The fourth proportional to 128,944.80, 177,934.91 and 71,579.61 is: 98,774.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,944.80 : 177,934.91 = 71,579.61 : x
  2. Step 2: Convert to fraction form
    128,944.80/177,934.91 = 71,579.61/x
  3. Step 3: Cross multiply
    128,944.80x = 177,934.91 × 71,579.61
  4. Step 4: Simplify right side
    128,944.80x = 12,736,511,105.29
  5. Step 5: Solve for x
    x = 12,736,511,105.29/128,944.80
  6. Step 6: Final answer
    x = 98,774.91

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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.