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Finding the Fourth Proportional to 158.16, 235.76 and 155.43

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Solution

The fourth proportional to 158.16, 235.76 and 155.43 is: 231.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.16 : 235.76 = 155.43 : x
  2. Step 2: Convert to fraction form
    158.16/235.76 = 155.43/x
  3. Step 3: Cross multiply
    158.16x = 235.76 × 155.43
  4. Step 4: Simplify right side
    158.16x = 36,644.18
  5. Step 5: Solve for x
    x = 36,644.18/158.16
  6. Step 6: Final answer
    x = 231.69

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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.