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Finding the Fourth Proportional to 155.18, 213.19 and 127.46

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Solution

The fourth proportional to 155.18, 213.19 and 127.46 is: 175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.18 : 213.19 = 127.46 : x
  2. Step 2: Convert to fraction form
    155.18/213.19 = 127.46/x
  3. Step 3: Cross multiply
    155.18x = 213.19 × 127.46
  4. Step 4: Simplify right side
    155.18x = 27,172.56
  5. Step 5: Solve for x
    x = 27,172.56/155.18
  6. Step 6: Final answer
    x = 175.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.