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Finding the Fourth Proportional to 68,663.68, 102,936.96 and 65,397.76

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Solution

The fourth proportional to 68,663.68, 102,936.96 and 65,397.76 is: 98,040.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,663.68 : 102,936.96 = 65,397.76 : x
  2. Step 2: Convert to fraction form
    68,663.68/102,936.96 = 65,397.76/x
  3. Step 3: Cross multiply
    68,663.68x = 102,936.96 × 65,397.76
  4. Step 4: Simplify right side
    68,663.68x = 6,731,846,605.21
  5. Step 5: Solve for x
    x = 6,731,846,605.21/68,663.68
  6. Step 6: Final answer
    x = 98,040.87

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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.