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Finding the Fourth Proportional to 40,329.20, 60,378.60 and 35,721.20

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Solution

The fourth proportional to 40,329.20, 60,378.60 and 35,721.20 is: 53,479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,329.20 : 60,378.60 = 35,721.20 : x
  2. Step 2: Convert to fraction form
    40,329.20/60,378.60 = 35,721.20/x
  3. Step 3: Cross multiply
    40,329.20x = 60,378.60 × 35,721.20
  4. Step 4: Simplify right side
    40,329.20x = 2,156,796,046.32
  5. Step 5: Solve for x
    x = 2,156,796,046.32/40,329.20
  6. Step 6: Final answer
    x = 53,479.76

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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.