Home / 138,995.38-191,743.02-87,922.06

Finding the Fourth Proportional to 138,995.38, 191,743.02 and 87,922.06

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Solution

The fourth proportional to 138,995.38, 191,743.02 and 87,922.06 is: 121,287.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,995.38 : 191,743.02 = 87,922.06 : x
  2. Step 2: Convert to fraction form
    138,995.38/191,743.02 = 87,922.06/x
  3. Step 3: Cross multiply
    138,995.38x = 191,743.02 × 87,922.06
  4. Step 4: Simplify right side
    138,995.38x = 16,858,441,309.02
  5. Step 5: Solve for x
    x = 16,858,441,309.02/138,995.38
  6. Step 6: Final answer
    x = 121,287.78

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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.