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Finding the Fourth Proportional to 105.63, 158.51 and 53.56

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Solution

The fourth proportional to 105.63, 158.51 and 53.56 is: 80.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.63 : 158.51 = 53.56 : x
  2. Step 2: Convert to fraction form
    105.63/158.51 = 53.56/x
  3. Step 3: Cross multiply
    105.63x = 158.51 × 53.56
  4. Step 4: Simplify right side
    105.63x = 8,489.80
  5. Step 5: Solve for x
    x = 8,489.80/105.63
  6. Step 6: Final answer
    x = 80.37

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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.