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Finding the Fourth Proportional to 138,757.59, 208,195.79 and 43,995.56

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Solution

The fourth proportional to 138,757.59, 208,195.79 and 43,995.56 is: 66,012.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,757.59 : 208,195.79 = 43,995.56 : x
  2. Step 2: Convert to fraction form
    138,757.59/208,195.79 = 43,995.56/x
  3. Step 3: Cross multiply
    138,757.59x = 208,195.79 × 43,995.56
  4. Step 4: Simplify right side
    138,757.59x = 9,159,689,109.74
  5. Step 5: Solve for x
    x = 9,159,689,109.74/138,757.59
  6. Step 6: Final answer
    x = 66,012.17

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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.