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Finding the Fourth Proportional to 138,715.56, 208,112.22 and 55,667.88

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Solution

The fourth proportional to 138,715.56, 208,112.22 and 55,667.88 is: 83,517.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,715.56 : 208,112.22 = 55,667.88 : x
  2. Step 2: Convert to fraction form
    138,715.56/208,112.22 = 55,667.88/x
  3. Step 3: Cross multiply
    138,715.56x = 208,112.22 × 55,667.88
  4. Step 4: Simplify right side
    138,715.56x = 11,585,166,089.49
  5. Step 5: Solve for x
    x = 11,585,166,089.49/138,715.56
  6. Step 6: Final answer
    x = 83,517.42

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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.