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Finding the Fourth Proportional to 68,315.20, 102,472.80 and 63,908.80

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Solution

The fourth proportional to 68,315.20, 102,472.80 and 63,908.80 is: 95,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,315.20 : 102,472.80 = 63,908.80 : x
  2. Step 2: Convert to fraction form
    68,315.20/102,472.80 = 63,908.80/x
  3. Step 3: Cross multiply
    68,315.20x = 102,472.80 × 63,908.80
  4. Step 4: Simplify right side
    68,315.20x = 6,548,913,680.64
  5. Step 5: Solve for x
    x = 6,548,913,680.64/68,315.20
  6. Step 6: Final answer
    x = 95,863.20

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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.