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Finding the Fourth Proportional to 102.74, 154.08 and 64.27

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Solution

The fourth proportional to 102.74, 154.08 and 64.27 is: 96.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.74 : 154.08 = 64.27 : x
  2. Step 2: Convert to fraction form
    102.74/154.08 = 64.27/x
  3. Step 3: Cross multiply
    102.74x = 154.08 × 64.27
  4. Step 4: Simplify right side
    102.74x = 9,902.34
  5. Step 5: Solve for x
    x = 9,902.34/102.74
  6. Step 6: Final answer
    x = 96.38

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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.