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Finding the Fourth Proportional to 139,218.74, 208,831.70 and 44,448.83

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Solution

The fourth proportional to 139,218.74, 208,831.70 and 44,448.83 is: 66,674.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,218.74 : 208,831.70 = 44,448.83 : x
  2. Step 2: Convert to fraction form
    139,218.74/208,831.70 = 44,448.83/x
  3. Step 3: Cross multiply
    139,218.74x = 208,831.70 × 44,448.83
  4. Step 4: Simplify right side
    139,218.74x = 9,282,324,731.91
  5. Step 5: Solve for x
    x = 9,282,324,731.91/139,218.74
  6. Step 6: Final answer
    x = 66,674.39

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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.