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Finding the Fourth Proportional to 158.01, 236.91 and 76.81

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Solution

The fourth proportional to 158.01, 236.91 and 76.81 is: 115.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.01 : 236.91 = 76.81 : x
  2. Step 2: Convert to fraction form
    158.01/236.91 = 76.81/x
  3. Step 3: Cross multiply
    158.01x = 236.91 × 76.81
  4. Step 4: Simplify right side
    158.01x = 18,195.87
  5. Step 5: Solve for x
    x = 18,195.87/158.01
  6. Step 6: Final answer
    x = 115.16

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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.