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Finding the Fourth Proportional to 138,908.47, 208,375.03 and 39,069.49

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Solution

The fourth proportional to 138,908.47, 208,375.03 and 39,069.49 is: 58,607.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,908.47 : 208,375.03 = 39,069.49 : x
  2. Step 2: Convert to fraction form
    138,908.47/208,375.03 = 39,069.49/x
  3. Step 3: Cross multiply
    138,908.47x = 208,375.03 × 39,069.49
  4. Step 4: Simplify right side
    138,908.47x = 8,141,106,069.44
  5. Step 5: Solve for x
    x = 8,141,106,069.44/138,908.47
  6. Step 6: Final answer
    x = 58,607.70

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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.