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Finding the Fourth Proportional to 158.16, 235.98 and 131.28

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Solution

The fourth proportional to 158.16, 235.98 and 131.28 is: 195.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.16 : 235.98 = 131.28 : x
  2. Step 2: Convert to fraction form
    158.16/235.98 = 131.28/x
  3. Step 3: Cross multiply
    158.16x = 235.98 × 131.28
  4. Step 4: Simplify right side
    158.16x = 30,979.45
  5. Step 5: Solve for x
    x = 30,979.45/158.16
  6. Step 6: Final answer
    x = 195.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.