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Finding the Fourth Proportional to 139,151.30, 208,708.39 and 39,320.54

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Solution

The fourth proportional to 139,151.30, 208,708.39 and 39,320.54 is: 58,975.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,151.30 : 208,708.39 = 39,320.54 : x
  2. Step 2: Convert to fraction form
    139,151.30/208,708.39 = 39,320.54/x
  3. Step 3: Cross multiply
    139,151.30x = 208,708.39 × 39,320.54
  4. Step 4: Simplify right side
    139,151.30x = 8,206,526,597.33
  5. Step 5: Solve for x
    x = 8,206,526,597.33/139,151.30
  6. Step 6: Final answer
    x = 58,975.57

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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.