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Finding the Fourth Proportional to 97.02, 133.92 and 91.22

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Solution

The fourth proportional to 97.02, 133.92 and 91.22 is: 125.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.02 : 133.92 = 91.22 : x
  2. Step 2: Convert to fraction form
    97.02/133.92 = 91.22/x
  3. Step 3: Cross multiply
    97.02x = 133.92 × 91.22
  4. Step 4: Simplify right side
    97.02x = 12,215.51
  5. Step 5: Solve for x
    x = 12,215.51/97.02
  6. Step 6: Final answer
    x = 125.91

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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.