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Finding the Fourth Proportional to 92.37, 125.85 and 90.39

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Solution

The fourth proportional to 92.37, 125.85 and 90.39 is: 123.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.37 : 125.85 = 90.39 : x
  2. Step 2: Convert to fraction form
    92.37/125.85 = 90.39/x
  3. Step 3: Cross multiply
    92.37x = 125.85 × 90.39
  4. Step 4: Simplify right side
    92.37x = 11,375.58
  5. Step 5: Solve for x
    x = 11,375.58/92.37
  6. Step 6: Final answer
    x = 123.15

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.