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Finding the Fourth Proportional to 89.14, 122.98 and 60.05

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Solution

The fourth proportional to 89.14, 122.98 and 60.05 is: 82.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.14 : 122.98 = 60.05 : x
  2. Step 2: Convert to fraction form
    89.14/122.98 = 60.05/x
  3. Step 3: Cross multiply
    89.14x = 122.98 × 60.05
  4. Step 4: Simplify right side
    89.14x = 7,384.95
  5. Step 5: Solve for x
    x = 7,384.95/89.14
  6. Step 6: Final answer
    x = 82.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.