Home / 128,626.80-177,514.38-77,652.06

Finding the Fourth Proportional to 128,626.80, 177,514.38 and 77,652.06

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Solution

The fourth proportional to 128,626.80, 177,514.38 and 77,652.06 is: 107,165.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,626.80 : 177,514.38 = 77,652.06 : x
  2. Step 2: Convert to fraction form
    128,626.80/177,514.38 = 77,652.06/x
  3. Step 3: Cross multiply
    128,626.80x = 177,514.38 × 77,652.06
  4. Step 4: Simplify right side
    128,626.80x = 13,784,357,286.62
  5. Step 5: Solve for x
    x = 13,784,357,286.62/128,626.80
  6. Step 6: Final answer
    x = 107,165.52

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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.