Home / 128,240.28-192,399.30-61,661.52

Finding the Fourth Proportional to 128,240.28, 192,399.30 and 61,661.52

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Solution

The fourth proportional to 128,240.28, 192,399.30 and 61,661.52 is: 92,510.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,240.28 : 192,399.30 = 61,661.52 : x
  2. Step 2: Convert to fraction form
    128,240.28/192,399.30 = 61,661.52/x
  3. Step 3: Cross multiply
    128,240.28x = 192,399.30 × 61,661.52
  4. Step 4: Simplify right side
    128,240.28x = 11,863,633,284.94
  5. Step 5: Solve for x
    x = 11,863,633,284.94/128,240.28
  6. Step 6: Final answer
    x = 92,510.97

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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.