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Finding the Fourth Proportional to 68,501.76, 102,755.52 and 21,761.28

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Solution

The fourth proportional to 68,501.76, 102,755.52 and 21,761.28 is: 32,642.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,501.76 : 102,755.52 = 21,761.28 : x
  2. Step 2: Convert to fraction form
    68,501.76/102,755.52 = 21,761.28/x
  3. Step 3: Cross multiply
    68,501.76x = 102,755.52 × 21,761.28
  4. Step 4: Simplify right side
    68,501.76x = 2,236,091,642.27
  5. Step 5: Solve for x
    x = 2,236,091,642.27/68,501.76
  6. Step 6: Final answer
    x = 32,642.83

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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.