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Finding the Fourth Proportional to 68,101.20, 102,151.92 and 21,357.76

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Solution

The fourth proportional to 68,101.20, 102,151.92 and 21,357.76 is: 32,036.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,101.20 : 102,151.92 = 21,357.76 : x
  2. Step 2: Convert to fraction form
    68,101.20/102,151.92 = 21,357.76/x
  3. Step 3: Cross multiply
    68,101.20x = 102,151.92 × 21,357.76
  4. Step 4: Simplify right side
    68,101.20x = 2,181,736,190.90
  5. Step 5: Solve for x
    x = 2,181,736,190.90/68,101.20
  6. Step 6: Final answer
    x = 32,036.68

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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.