Home / 128,145.50-192,257.25-60,729.18

Finding the Fourth Proportional to 128,145.50, 192,257.25 and 60,729.18

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Solution

The fourth proportional to 128,145.50, 192,257.25 and 60,729.18 is: 91,112.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,145.50 : 192,257.25 = 60,729.18 : x
  2. Step 2: Convert to fraction form
    128,145.50/192,257.25 = 60,729.18/x
  3. Step 3: Cross multiply
    128,145.50x = 192,257.25 × 60,729.18
  4. Step 4: Simplify right side
    128,145.50x = 11,675,625,141.56
  5. Step 5: Solve for x
    x = 11,675,625,141.56/128,145.50
  6. Step 6: Final answer
    x = 91,112.26

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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.