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Finding the Fourth Proportional to 65.14, 97.78 and 50.85

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Solution

The fourth proportional to 65.14, 97.78 and 50.85 is: 76.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.14 : 97.78 = 50.85 : x
  2. Step 2: Convert to fraction form
    65.14/97.78 = 50.85/x
  3. Step 3: Cross multiply
    65.14x = 97.78 × 50.85
  4. Step 4: Simplify right side
    65.14x = 4,971.89
  5. Step 5: Solve for x
    x = 4,971.89/65.14
  6. Step 6: Final answer
    x = 76.33

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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.