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Finding the Fourth Proportional to 92.03, 126.89 and 85.88

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Solution

The fourth proportional to 92.03, 126.89 and 85.88 is: 118.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.03 : 126.89 = 85.88 : x
  2. Step 2: Convert to fraction form
    92.03/126.89 = 85.88/x
  3. Step 3: Cross multiply
    92.03x = 126.89 × 85.88
  4. Step 4: Simplify right side
    92.03x = 10,897.31
  5. Step 5: Solve for x
    x = 10,897.31/92.03
  6. Step 6: Final answer
    x = 118.41

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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.