Home / 128,514.78-177,350.35-71,926.15

Finding the Fourth Proportional to 128,514.78, 177,350.35 and 71,926.15

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Solution

The fourth proportional to 128,514.78, 177,350.35 and 71,926.15 is: 99,258.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,514.78 : 177,350.35 = 71,926.15 : x
  2. Step 2: Convert to fraction form
    128,514.78/177,350.35 = 71,926.15/x
  3. Step 3: Cross multiply
    128,514.78x = 177,350.35 × 71,926.15
  4. Step 4: Simplify right side
    128,514.78x = 12,756,127,876.65
  5. Step 5: Solve for x
    x = 12,756,127,876.65/128,514.78
  6. Step 6: Final answer
    x = 99,258.06

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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.