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Finding the Fourth Proportional to 79,152.30, 109,246.68 and 72,768.78

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Solution

The fourth proportional to 79,152.30, 109,246.68 and 72,768.78 is: 100,436.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,152.30 : 109,246.68 = 72,768.78 : x
  2. Step 2: Convert to fraction form
    79,152.30/109,246.68 = 72,768.78/x
  3. Step 3: Cross multiply
    79,152.30x = 109,246.68 × 72,768.78
  4. Step 4: Simplify right side
    79,152.30x = 7,949,747,622.65
  5. Step 5: Solve for x
    x = 7,949,747,622.65/79,152.30
  6. Step 6: Final answer
    x = 100,436.09

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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.