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Finding the Fourth Proportional to 97.53, 134.61 and 64.80

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Solution

The fourth proportional to 97.53, 134.61 and 64.80 is: 89.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.53 : 134.61 = 64.80 : x
  2. Step 2: Convert to fraction form
    97.53/134.61 = 64.80/x
  3. Step 3: Cross multiply
    97.53x = 134.61 × 64.80
  4. Step 4: Simplify right side
    97.53x = 8,722.73
  5. Step 5: Solve for x
    x = 8,722.73/97.53
  6. Step 6: Final answer
    x = 89.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.