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Finding the Fourth Proportional to 144,787.20, 217,180.80 and 122,917.20

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Solution

The fourth proportional to 144,787.20, 217,180.80 and 122,917.20 is: 184,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,787.20 : 217,180.80 = 122,917.20 : x
  2. Step 2: Convert to fraction form
    144,787.20/217,180.80 = 122,917.20/x
  3. Step 3: Cross multiply
    144,787.20x = 217,180.80 × 122,917.20
  4. Step 4: Simplify right side
    144,787.20x = 26,695,255,829.76
  5. Step 5: Solve for x
    x = 26,695,255,829.76/144,787.20
  6. Step 6: Final answer
    x = 184,375.80

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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.