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Finding the Fourth Proportional to 90.60, 125.61 and 88.44

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Solution

The fourth proportional to 90.60, 125.61 and 88.44 is: 122.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.60 : 125.61 = 88.44 : x
  2. Step 2: Convert to fraction form
    90.60/125.61 = 88.44/x
  3. Step 3: Cross multiply
    90.60x = 125.61 × 88.44
  4. Step 4: Simplify right side
    90.60x = 11,108.95
  5. Step 5: Solve for x
    x = 11,108.95/90.60
  6. Step 6: Final answer
    x = 122.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.