Home / 128,875.43-177,849.06-71,514.97

Finding the Fourth Proportional to 128,875.43, 177,849.06 and 71,514.97

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Solution

The fourth proportional to 128,875.43, 177,849.06 and 71,514.97 is: 98,691.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,875.43 : 177,849.06 = 71,514.97 : x
  2. Step 2: Convert to fraction form
    128,875.43/177,849.06 = 71,514.97/x
  3. Step 3: Cross multiply
    128,875.43x = 177,849.06 × 71,514.97
  4. Step 4: Simplify right side
    128,875.43x = 12,718,870,190.43
  5. Step 5: Solve for x
    x = 12,718,870,190.43/128,875.43
  6. Step 6: Final answer
    x = 98,691.19

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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.