Home / 138,639.78-191,234.82-90,896.22

Finding the Fourth Proportional to 138,639.78, 191,234.82 and 90,896.22

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Solution

The fourth proportional to 138,639.78, 191,234.82 and 90,896.22 is: 125,379.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,639.78 : 191,234.82 = 90,896.22 : x
  2. Step 2: Convert to fraction form
    138,639.78/191,234.82 = 90,896.22/x
  3. Step 3: Cross multiply
    138,639.78x = 191,234.82 × 90,896.22
  4. Step 4: Simplify right side
    138,639.78x = 17,382,522,270.38
  5. Step 5: Solve for x
    x = 17,382,522,270.38/138,639.78
  6. Step 6: Final answer
    x = 125,379.04

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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.