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Finding the Fourth Proportional to 138,887.65, 208,343.79 and 39,048.72

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Solution

The fourth proportional to 138,887.65, 208,343.79 and 39,048.72 is: 58,576.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.65 : 208,343.79 = 39,048.72 : x
  2. Step 2: Convert to fraction form
    138,887.65/208,343.79 = 39,048.72/x
  3. Step 3: Cross multiply
    138,887.65x = 208,343.79 × 39,048.72
  4. Step 4: Simplify right side
    138,887.65x = 8,135,557,428.34
  5. Step 5: Solve for x
    x = 8,135,557,428.34/138,887.65
  6. Step 6: Final answer
    x = 58,576.53

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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.