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Finding the Fourth Proportional to 97.84, 146.56 and 57.20

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Solution

The fourth proportional to 97.84, 146.56 and 57.20 is: 85.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.84 : 146.56 = 57.20 : x
  2. Step 2: Convert to fraction form
    97.84/146.56 = 57.20/x
  3. Step 3: Cross multiply
    97.84x = 146.56 × 57.20
  4. Step 4: Simplify right side
    97.84x = 8,383.23
  5. Step 5: Solve for x
    x = 8,383.23/97.84
  6. Step 6: Final answer
    x = 85.68

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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.