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Finding the Fourth Proportional to 104.68, 157.87 and 102.76

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Solution

The fourth proportional to 104.68, 157.87 and 102.76 is: 154.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.68 : 157.87 = 102.76 : x
  2. Step 2: Convert to fraction form
    104.68/157.87 = 102.76/x
  3. Step 3: Cross multiply
    104.68x = 157.87 × 102.76
  4. Step 4: Simplify right side
    104.68x = 16,222.72
  5. Step 5: Solve for x
    x = 16,222.72/104.68
  6. Step 6: Final answer
    x = 154.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.