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Finding the Fourth Proportional to 217,974.38, 300,831.52 and 122,479

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Solution

The fourth proportional to 217,974.38, 300,831.52 and 122,479 is: 169,036.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,974.38 : 300,831.52 = 122,479 : x
  2. Step 2: Convert to fraction form
    217,974.38/300,831.52 = 122,479/x
  3. Step 3: Cross multiply
    217,974.38x = 300,831.52 × 122,479
  4. Step 4: Simplify right side
    217,974.38x = 36,845,543,738.08
  5. Step 5: Solve for x
    x = 36,845,543,738.08/217,974.38
  6. Step 6: Final answer
    x = 169,036.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.