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Finding the Fourth Proportional to 156.57, 215.97 and 97.54

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Solution

The fourth proportional to 156.57, 215.97 and 97.54 is: 134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.57 : 215.97 = 97.54 : x
  2. Step 2: Convert to fraction form
    156.57/215.97 = 97.54/x
  3. Step 3: Cross multiply
    156.57x = 215.97 × 97.54
  4. Step 4: Simplify right side
    156.57x = 21,065.71
  5. Step 5: Solve for x
    x = 21,065.71/156.57
  6. Step 6: Final answer
    x = 134.55

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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.