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Finding the Fourth Proportional to 97.14, 133.71 and 85.02

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Solution

The fourth proportional to 97.14, 133.71 and 85.02 is: 117.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.14 : 133.71 = 85.02 : x
  2. Step 2: Convert to fraction form
    97.14/133.71 = 85.02/x
  3. Step 3: Cross multiply
    97.14x = 133.71 × 85.02
  4. Step 4: Simplify right side
    97.14x = 11,368.02
  5. Step 5: Solve for x
    x = 11,368.02/97.14
  6. Step 6: Final answer
    x = 117.03

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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.