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Finding the Fourth Proportional to 88.90, 133.36 and 23.90

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Solution

The fourth proportional to 88.90, 133.36 and 23.90 is: 35.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.90 : 133.36 = 23.90 : x
  2. Step 2: Convert to fraction form
    88.90/133.36 = 23.90/x
  3. Step 3: Cross multiply
    88.90x = 133.36 × 23.90
  4. Step 4: Simplify right side
    88.90x = 3,186.58
  5. Step 5: Solve for x
    x = 3,186.58/88.90
  6. Step 6: Final answer
    x = 35.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.