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Finding the Fourth Proportional to 158.90, 219.27 and 135.55

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Solution

The fourth proportional to 158.90, 219.27 and 135.55 is: 187.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.90 : 219.27 = 135.55 : x
  2. Step 2: Convert to fraction form
    158.90/219.27 = 135.55/x
  3. Step 3: Cross multiply
    158.90x = 219.27 × 135.55
  4. Step 4: Simplify right side
    158.90x = 29,721.64
  5. Step 5: Solve for x
    x = 29,721.64/158.90
  6. Step 6: Final answer
    x = 187.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.