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Finding the Fourth Proportional to 89.46, 133.87 and 66.58

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Solution

The fourth proportional to 89.46, 133.87 and 66.58 is: 99.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.46 : 133.87 = 66.58 : x
  2. Step 2: Convert to fraction form
    89.46/133.87 = 66.58/x
  3. Step 3: Cross multiply
    89.46x = 133.87 × 66.58
  4. Step 4: Simplify right side
    89.46x = 8,913.06
  5. Step 5: Solve for x
    x = 8,913.06/89.46
  6. Step 6: Final answer
    x = 99.63

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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.