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Finding the Fourth Proportional to 155.17, 213.99 and 127.37

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Solution

The fourth proportional to 155.17, 213.99 and 127.37 is: 175.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.17 : 213.99 = 127.37 : x
  2. Step 2: Convert to fraction form
    155.17/213.99 = 127.37/x
  3. Step 3: Cross multiply
    155.17x = 213.99 × 127.37
  4. Step 4: Simplify right side
    155.17x = 27,256.68
  5. Step 5: Solve for x
    x = 27,256.68/155.17
  6. Step 6: Final answer
    x = 175.66

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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.