Home / 128,610.31-177,480.30-71,249.51

Finding the Fourth Proportional to 128,610.31, 177,480.30 and 71,249.51

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Solution

The fourth proportional to 128,610.31, 177,480.30 and 71,249.51 is: 98,323.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,610.31 : 177,480.30 = 71,249.51 : x
  2. Step 2: Convert to fraction form
    128,610.31/177,480.30 = 71,249.51/x
  3. Step 3: Cross multiply
    128,610.31x = 177,480.30 × 71,249.51
  4. Step 4: Simplify right side
    128,610.31x = 12,645,384,409.65
  5. Step 5: Solve for x
    x = 12,645,384,409.65/128,610.31
  6. Step 6: Final answer
    x = 98,323.26

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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.