Home / 128,019.22-176,617.25-80,189.30

Finding the Fourth Proportional to 128,019.22, 176,617.25 and 80,189.30

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Solution

The fourth proportional to 128,019.22, 176,617.25 and 80,189.30 is: 110,630.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,019.22 : 176,617.25 = 80,189.30 : x
  2. Step 2: Convert to fraction form
    128,019.22/176,617.25 = 80,189.30/x
  3. Step 3: Cross multiply
    128,019.22x = 176,617.25 × 80,189.30
  4. Step 4: Simplify right side
    128,019.22x = 14,162,813,645.43
  5. Step 5: Solve for x
    x = 14,162,813,645.43/128,019.22
  6. Step 6: Final answer
    x = 110,630.37

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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.