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Finding the Fourth Proportional to 105.57, 158.49 and 88.66

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Solution

The fourth proportional to 105.57, 158.49 and 88.66 is: 133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.57 : 158.49 = 88.66 : x
  2. Step 2: Convert to fraction form
    105.57/158.49 = 88.66/x
  3. Step 3: Cross multiply
    105.57x = 158.49 × 88.66
  4. Step 4: Simplify right side
    105.57x = 14,051.72
  5. Step 5: Solve for x
    x = 14,051.72/105.57
  6. Step 6: Final answer
    x = 133.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.