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Finding the Fourth Proportional to 68,472.20, 102,708.30 and 40,824.20

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Solution

The fourth proportional to 68,472.20, 102,708.30 and 40,824.20 is: 61,236.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,472.20 : 102,708.30 = 40,824.20 : x
  2. Step 2: Convert to fraction form
    68,472.20/102,708.30 = 40,824.20/x
  3. Step 3: Cross multiply
    68,472.20x = 102,708.30 × 40,824.20
  4. Step 4: Simplify right side
    68,472.20x = 4,192,984,180.86
  5. Step 5: Solve for x
    x = 4,192,984,180.86/68,472.20
  6. Step 6: Final answer
    x = 61,236.30

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1.5x scale

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.