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Finding the Fourth Proportional to 105.60, 158.31 and 51.52

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Solution

The fourth proportional to 105.60, 158.31 and 51.52 is: 77.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.60 : 158.31 = 51.52 : x
  2. Step 2: Convert to fraction form
    105.60/158.31 = 51.52/x
  3. Step 3: Cross multiply
    105.60x = 158.31 × 51.52
  4. Step 4: Simplify right side
    105.60x = 8,156.13
  5. Step 5: Solve for x
    x = 8,156.13/105.60
  6. Step 6: Final answer
    x = 77.24

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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.