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Finding the Fourth Proportional to 158.18, 235.62 and 155.60

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Solution

The fourth proportional to 158.18, 235.62 and 155.60 is: 231.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.18 : 235.62 = 155.60 : x
  2. Step 2: Convert to fraction form
    158.18/235.62 = 155.60/x
  3. Step 3: Cross multiply
    158.18x = 235.62 × 155.60
  4. Step 4: Simplify right side
    158.18x = 36,661.29
  5. Step 5: Solve for x
    x = 36,661.29/158.18
  6. Step 6: Final answer
    x = 231.78

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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.