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Finding the Fourth Proportional to 102,961.20, 154,441.80 and 36,400.80

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Solution

The fourth proportional to 102,961.20, 154,441.80 and 36,400.80 is: 54,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,961.20 : 154,441.80 = 36,400.80 : x
  2. Step 2: Convert to fraction form
    102,961.20/154,441.80 = 36,400.80/x
  3. Step 3: Cross multiply
    102,961.20x = 154,441.80 × 36,400.80
  4. Step 4: Simplify right side
    102,961.20x = 5,621,805,073.44
  5. Step 5: Solve for x
    x = 5,621,805,073.44/102,961.20
  6. Step 6: Final answer
    x = 54,601.20

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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.