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Finding the Fourth Proportional to 155.68, 214.86 and 97.48

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Solution

The fourth proportional to 155.68, 214.86 and 97.48 is: 134.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.68 : 214.86 = 97.48 : x
  2. Step 2: Convert to fraction form
    155.68/214.86 = 97.48/x
  3. Step 3: Cross multiply
    155.68x = 214.86 × 97.48
  4. Step 4: Simplify right side
    155.68x = 20,944.55
  5. Step 5: Solve for x
    x = 20,944.55/155.68
  6. Step 6: Final answer
    x = 134.54

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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.