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Finding the Fourth Proportional to 173,170.80, 259,318.80 and 138,178.80

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Solution

The fourth proportional to 173,170.80, 259,318.80 and 138,178.80 is: 206,919.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,170.80 : 259,318.80 = 138,178.80 : x
  2. Step 2: Convert to fraction form
    173,170.80/259,318.80 = 138,178.80/x
  3. Step 3: Cross multiply
    173,170.80x = 259,318.80 × 138,178.80
  4. Step 4: Simplify right side
    173,170.80x = 35,832,360,601.44
  5. Step 5: Solve for x
    x = 35,832,360,601.44/173,170.80
  6. Step 6: Final answer
    x = 206,919.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.