Home / 138,842.13-208,122.98-54,661.38

Finding the Fourth Proportional to 138,842.13, 208,122.98 and 54,661.38

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Solution

The fourth proportional to 138,842.13, 208,122.98 and 54,661.38 is: 81,936.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,842.13 : 208,122.98 = 54,661.38 : x
  2. Step 2: Convert to fraction form
    138,842.13/208,122.98 = 54,661.38/x
  3. Step 3: Cross multiply
    138,842.13x = 208,122.98 × 54,661.38
  4. Step 4: Simplify right side
    138,842.13x = 11,376,289,296.51
  5. Step 5: Solve for x
    x = 11,376,289,296.51/138,842.13
  6. Step 6: Final answer
    x = 81,936.87

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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.