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Finding the Fourth Proportional to 88.83, 133.21 and 54.12

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Solution

The fourth proportional to 88.83, 133.21 and 54.12 is: 81.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.83 : 133.21 = 54.12 : x
  2. Step 2: Convert to fraction form
    88.83/133.21 = 54.12/x
  3. Step 3: Cross multiply
    88.83x = 133.21 × 54.12
  4. Step 4: Simplify right side
    88.83x = 7,209.14
  5. Step 5: Solve for x
    x = 7,209.14/88.83
  6. Step 6: Final answer
    x = 81.16

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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.