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Finding the Fourth Proportional to 155.68, 215.22 and 136.24

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Solution

The fourth proportional to 155.68, 215.22 and 136.24 is: 188.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.68 : 215.22 = 136.24 : x
  2. Step 2: Convert to fraction form
    155.68/215.22 = 136.24/x
  3. Step 3: Cross multiply
    155.68x = 215.22 × 136.24
  4. Step 4: Simplify right side
    155.68x = 29,321.57
  5. Step 5: Solve for x
    x = 29,321.57/155.68
  6. Step 6: Final answer
    x = 188.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.