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Finding the Fourth Proportional to 81,098.48, 121,247.80 and 68,756.24

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Solution

The fourth proportional to 81,098.48, 121,247.80 and 68,756.24 is: 102,795.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,098.48 : 121,247.80 = 68,756.24 : x
  2. Step 2: Convert to fraction form
    81,098.48/121,247.80 = 68,756.24/x
  3. Step 3: Cross multiply
    81,098.48x = 121,247.80 × 68,756.24
  4. Step 4: Simplify right side
    81,098.48x = 8,336,542,836.27
  5. Step 5: Solve for x
    x = 8,336,542,836.27/81,098.48
  6. Step 6: Final answer
    x = 102,795.30

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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.