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Finding the Fourth Proportional to 89.13, 133.38 and 65.10

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Solution

The fourth proportional to 89.13, 133.38 and 65.10 is: 97.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.13 : 133.38 = 65.10 : x
  2. Step 2: Convert to fraction form
    89.13/133.38 = 65.10/x
  3. Step 3: Cross multiply
    89.13x = 133.38 × 65.10
  4. Step 4: Simplify right side
    89.13x = 8,683.04
  5. Step 5: Solve for x
    x = 8,683.04/89.13
  6. Step 6: Final answer
    x = 97.42

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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.