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Finding the Fourth Proportional to 156.00, 215.23 and 96.97

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Solution

The fourth proportional to 156.00, 215.23 and 96.97 is: 133.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.00 : 215.23 = 96.97 : x
  2. Step 2: Convert to fraction form
    156.00/215.23 = 96.97/x
  3. Step 3: Cross multiply
    156.00x = 215.23 × 96.97
  4. Step 4: Simplify right side
    156.00x = 20,869.78
  5. Step 5: Solve for x
    x = 20,869.78/156.00
  6. Step 6: Final answer
    x = 133.78

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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.