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Finding the Fourth Proportional to 155.90, 215.04 and 96.83

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Solution

The fourth proportional to 155.90, 215.04 and 96.83 is: 133.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.90 : 215.04 = 96.83 : x
  2. Step 2: Convert to fraction form
    155.90/215.04 = 96.83/x
  3. Step 3: Cross multiply
    155.90x = 215.04 × 96.83
  4. Step 4: Simplify right side
    155.90x = 20,821.79
  5. Step 5: Solve for x
    x = 20,821.79/155.90
  6. Step 6: Final answer
    x = 133.56

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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.