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Finding the Fourth Proportional to 155.76, 232.66 and 131.46

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Solution

The fourth proportional to 155.76, 232.66 and 131.46 is: 196.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.76 : 232.66 = 131.46 : x
  2. Step 2: Convert to fraction form
    155.76/232.66 = 131.46/x
  3. Step 3: Cross multiply
    155.76x = 232.66 × 131.46
  4. Step 4: Simplify right side
    155.76x = 30,585.48
  5. Step 5: Solve for x
    x = 30,585.48/155.76
  6. Step 6: Final answer
    x = 196.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.