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Finding the Fourth Proportional to 212.88, 293.78 and 125.56

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Solution

The fourth proportional to 212.88, 293.78 and 125.56 is: 173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.88 : 293.78 = 125.56 : x
  2. Step 2: Convert to fraction form
    212.88/293.78 = 125.56/x
  3. Step 3: Cross multiply
    212.88x = 293.78 × 125.56
  4. Step 4: Simplify right side
    212.88x = 36,887.02
  5. Step 5: Solve for x
    x = 36,887.02/212.88
  6. Step 6: Final answer
    x = 173.28

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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.