Home / 138,512.23-208,201.79-91,429.97

Finding the Fourth Proportional to 138,512.23, 208,201.79 and 91,429.97

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Solution

The fourth proportional to 138,512.23, 208,201.79 and 91,429.97 is: 137,431.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,512.23 : 208,201.79 = 91,429.97 : x
  2. Step 2: Convert to fraction form
    138,512.23/208,201.79 = 91,429.97/x
  3. Step 3: Cross multiply
    138,512.23x = 208,201.79 × 91,429.97
  4. Step 4: Simplify right side
    138,512.23x = 19,035,882,601.21
  5. Step 5: Solve for x
    x = 19,035,882,601.21/138,512.23
  6. Step 6: Final answer
    x = 137,431.06

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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.