Home / 128,570.04-177,514.32-80,190.78

Finding the Fourth Proportional to 128,570.04, 177,514.32 and 80,190.78

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Solution

The fourth proportional to 128,570.04, 177,514.32 and 80,190.78 is: 110,717.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,570.04 : 177,514.32 = 80,190.78 : x
  2. Step 2: Convert to fraction form
    128,570.04/177,514.32 = 80,190.78/x
  3. Step 3: Cross multiply
    128,570.04x = 177,514.32 × 80,190.78
  4. Step 4: Simplify right side
    128,570.04x = 14,235,011,781.97
  5. Step 5: Solve for x
    x = 14,235,011,781.97/128,570.04
  6. Step 6: Final answer
    x = 110,717.95

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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.