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Finding the Fourth Proportional to 59.36, 81.16 and 57.12

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Solution

The fourth proportional to 59.36, 81.16 and 57.12 is: 78.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.36 : 81.16 = 57.12 : x
  2. Step 2: Convert to fraction form
    59.36/81.16 = 57.12/x
  3. Step 3: Cross multiply
    59.36x = 81.16 × 57.12
  4. Step 4: Simplify right side
    59.36x = 4,635.86
  5. Step 5: Solve for x
    x = 4,635.86/59.36
  6. Step 6: Final answer
    x = 78.10

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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.