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Finding the Fourth Proportional to 89.85, 134.62 and 55.53

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Solution

The fourth proportional to 89.85, 134.62 and 55.53 is: 83.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.85 : 134.62 = 55.53 : x
  2. Step 2: Convert to fraction form
    89.85/134.62 = 55.53/x
  3. Step 3: Cross multiply
    89.85x = 134.62 × 55.53
  4. Step 4: Simplify right side
    89.85x = 7,475.45
  5. Step 5: Solve for x
    x = 7,475.45/89.85
  6. Step 6: Final answer
    x = 83.20

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