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Finding the Fourth Proportional to 89.01, 122.58 and 83.12

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Solution

The fourth proportional to 89.01, 122.58 and 83.12 is: 114.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.01 : 122.58 = 83.12 : x
  2. Step 2: Convert to fraction form
    89.01/122.58 = 83.12/x
  3. Step 3: Cross multiply
    89.01x = 122.58 × 83.12
  4. Step 4: Simplify right side
    89.01x = 10,188.24
  5. Step 5: Solve for x
    x = 10,188.24/89.01
  6. Step 6: Final answer
    x = 114.46

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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.