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Finding the Fourth Proportional to 72,278.76, 108,355.79 and 34,787.26

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Solution

The fourth proportional to 72,278.76, 108,355.79 and 34,787.26 is: 52,150.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,278.76 : 108,355.79 = 34,787.26 : x
  2. Step 2: Convert to fraction form
    72,278.76/108,355.79 = 34,787.26/x
  3. Step 3: Cross multiply
    72,278.76x = 108,355.79 × 34,787.26
  4. Step 4: Simplify right side
    72,278.76x = 3,769,401,261.65
  5. Step 5: Solve for x
    x = 3,769,401,261.65/72,278.76
  6. Step 6: Final answer
    x = 52,150.88

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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.