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Finding the Fourth Proportional to 68,672.61, 102,824.34 and 43,576.78

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Solution

The fourth proportional to 68,672.61, 102,824.34 and 43,576.78 is: 65,248.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,672.61 : 102,824.34 = 43,576.78 : x
  2. Step 2: Convert to fraction form
    68,672.61/102,824.34 = 43,576.78/x
  3. Step 3: Cross multiply
    68,672.61x = 102,824.34 × 43,576.78
  4. Step 4: Simplify right side
    68,672.61x = 4,480,753,642.83
  5. Step 5: Solve for x
    x = 4,480,753,642.83/68,672.61
  6. Step 6: Final answer
    x = 65,248.05

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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.