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Finding the Fourth Proportional to 158.89, 221.02 and 155.92

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Solution

The fourth proportional to 158.89, 221.02 and 155.92 is: 216.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.89 : 221.02 = 155.92 : x
  2. Step 2: Convert to fraction form
    158.89/221.02 = 155.92/x
  3. Step 3: Cross multiply
    158.89x = 221.02 × 155.92
  4. Step 4: Simplify right side
    158.89x = 34,461.44
  5. Step 5: Solve for x
    x = 34,461.44/158.89
  6. Step 6: Final answer
    x = 216.89

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.