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Finding the Fourth Proportional to 198,479.86, 273,945.51 and 122,064.69

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Solution

The fourth proportional to 198,479.86, 273,945.51 and 122,064.69 is: 168,475.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,479.86 : 273,945.51 = 122,064.69 : x
  2. Step 2: Convert to fraction form
    198,479.86/273,945.51 = 122,064.69/x
  3. Step 3: Cross multiply
    198,479.86x = 273,945.51 × 122,064.69
  4. Step 4: Simplify right side
    198,479.86x = 33,439,074,782.34
  5. Step 5: Solve for x
    x = 33,439,074,782.34/198,479.86
  6. Step 6: Final answer
    x = 168,475.91

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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.