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Finding the Fourth Proportional to 118,974.86, 178,111.68 and 104,212.61

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Solution

The fourth proportional to 118,974.86, 178,111.68 and 104,212.61 is: 156,011.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,974.86 : 178,111.68 = 104,212.61 : x
  2. Step 2: Convert to fraction form
    118,974.86/178,111.68 = 104,212.61/x
  3. Step 3: Cross multiply
    118,974.86x = 178,111.68 × 104,212.61
  4. Step 4: Simplify right side
    118,974.86x = 18,561,482,153.73
  5. Step 5: Solve for x
    x = 18,561,482,153.73/118,974.86
  6. Step 6: Final answer
    x = 156,011.81

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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.