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Finding the Fourth Proportional to 139,105.15, 208,679.44 and 44,356.57

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Solution

The fourth proportional to 139,105.15, 208,679.44 and 44,356.57 is: 66,541.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,105.15 : 208,679.44 = 44,356.57 : x
  2. Step 2: Convert to fraction form
    139,105.15/208,679.44 = 44,356.57/x
  3. Step 3: Cross multiply
    139,105.15x = 208,679.44 × 44,356.57
  4. Step 4: Simplify right side
    139,105.15x = 9,256,304,187.92
  5. Step 5: Solve for x
    x = 9,256,304,187.92/139,105.15
  6. Step 6: Final answer
    x = 66,541.78

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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.