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Finding the Fourth Proportional to 65.14, 97.70 and 61.72

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Solution

The fourth proportional to 65.14, 97.70 and 61.72 is: 92.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.14 : 97.70 = 61.72 : x
  2. Step 2: Convert to fraction form
    65.14/97.70 = 61.72/x
  3. Step 3: Cross multiply
    65.14x = 97.70 × 61.72
  4. Step 4: Simplify right side
    65.14x = 6,029.49
  5. Step 5: Solve for x
    x = 6,029.49/65.14
  6. Step 6: Final answer
    x = 92.57

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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.