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Finding the Fourth Proportional to 129,759.16, 179,067.90 and 70,143.16

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Solution

The fourth proportional to 129,759.16, 179,067.90 and 70,143.16 is: 96,797.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,759.16 : 179,067.90 = 70,143.16 : x
  2. Step 2: Convert to fraction form
    129,759.16/179,067.90 = 70,143.16/x
  3. Step 3: Cross multiply
    129,759.16x = 179,067.90 × 70,143.16
  4. Step 4: Simplify right side
    129,759.16x = 12,560,388,360.56
  5. Step 5: Solve for x
    x = 12,560,388,360.56/129,759.16
  6. Step 6: Final answer
    x = 96,797.70

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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.