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Finding the Fourth Proportional to 57.09, 78.78 and 36.36

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Solution

The fourth proportional to 57.09, 78.78 and 36.36 is: 50.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.09 : 78.78 = 36.36 : x
  2. Step 2: Convert to fraction form
    57.09/78.78 = 36.36/x
  3. Step 3: Cross multiply
    57.09x = 78.78 × 36.36
  4. Step 4: Simplify right side
    57.09x = 2,864.44
  5. Step 5: Solve for x
    x = 2,864.44/57.09
  6. Step 6: Final answer
    x = 50.17

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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.