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Finding the Fourth Proportional to 139,239.38, 208,832.61 and 39,375.49

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Solution

The fourth proportional to 139,239.38, 208,832.61 and 39,375.49 is: 59,055.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,239.38 : 208,832.61 = 39,375.49 : x
  2. Step 2: Convert to fraction form
    139,239.38/208,832.61 = 39,375.49/x
  3. Step 3: Cross multiply
    139,239.38x = 208,832.61 × 39,375.49
  4. Step 4: Simplify right side
    139,239.38x = 8,222,886,346.73
  5. Step 5: Solve for x
    x = 8,222,886,346.73/139,239.38
  6. Step 6: Final answer
    x = 59,055.75

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1.5x scale

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.