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Finding the Fourth Proportional to 89.06, 133.65 and 43.42

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Solution

The fourth proportional to 89.06, 133.65 and 43.42 is: 65.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.06 : 133.65 = 43.42 : x
  2. Step 2: Convert to fraction form
    89.06/133.65 = 43.42/x
  3. Step 3: Cross multiply
    89.06x = 133.65 × 43.42
  4. Step 4: Simplify right side
    89.06x = 5,803.08
  5. Step 5: Solve for x
    x = 5,803.08/89.06
  6. Step 6: Final answer
    x = 65.16

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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.