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Finding the Fourth Proportional to 78,787.20, 108,722 and 44,791

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Solution

The fourth proportional to 78,787.20, 108,722 and 44,791 is: 61,809.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,787.20 : 108,722 = 44,791 : x
  2. Step 2: Convert to fraction form
    78,787.20/108,722 = 44,791/x
  3. Step 3: Cross multiply
    78,787.20x = 108,722 × 44,791
  4. Step 4: Simplify right side
    78,787.20x = 4,869,767,102
  5. Step 5: Solve for x
    x = 4,869,767,102/78,787.20
  6. Step 6: Final answer
    x = 61,809.11

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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.