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Finding the Fourth Proportional to 155.91, 215.06 and 97.59

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Solution

The fourth proportional to 155.91, 215.06 and 97.59 is: 134.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.91 : 215.06 = 97.59 : x
  2. Step 2: Convert to fraction form
    155.91/215.06 = 97.59/x
  3. Step 3: Cross multiply
    155.91x = 215.06 × 97.59
  4. Step 4: Simplify right side
    155.91x = 20,987.22
  5. Step 5: Solve for x
    x = 20,987.22/155.91
  6. Step 6: Final answer
    x = 134.61

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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.