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Finding the Fourth Proportional to 97.61, 134.52 and 68.45

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Solution

The fourth proportional to 97.61, 134.52 and 68.45 is: 94.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.61 : 134.52 = 68.45 : x
  2. Step 2: Convert to fraction form
    97.61/134.52 = 68.45/x
  3. Step 3: Cross multiply
    97.61x = 134.52 × 68.45
  4. Step 4: Simplify right side
    97.61x = 9,207.89
  5. Step 5: Solve for x
    x = 9,207.89/97.61
  6. Step 6: Final answer
    x = 94.33

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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.