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Finding the Fourth Proportional to 57.07, 78.72 and 36.34

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Solution

The fourth proportional to 57.07, 78.72 and 36.34 is: 50.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.07 : 78.72 = 36.34 : x
  2. Step 2: Convert to fraction form
    57.07/78.72 = 36.34/x
  3. Step 3: Cross multiply
    57.07x = 78.72 × 36.34
  4. Step 4: Simplify right side
    57.07x = 2,860.68
  5. Step 5: Solve for x
    x = 2,860.68/57.07
  6. Step 6: Final answer
    x = 50.13

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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.