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Finding the Fourth Proportional to 138,661.56, 208,018.26 and 55,562.04

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Solution

The fourth proportional to 138,661.56, 208,018.26 and 55,562.04 is: 83,353.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,661.56 : 208,018.26 = 55,562.04 : x
  2. Step 2: Convert to fraction form
    138,661.56/208,018.26 = 55,562.04/x
  3. Step 3: Cross multiply
    138,661.56x = 208,018.26 × 55,562.04
  4. Step 4: Simplify right side
    138,661.56x = 11,557,918,882.85
  5. Step 5: Solve for x
    x = 11,557,918,882.85/138,661.56
  6. Step 6: Final answer
    x = 83,353.45

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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.