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Finding the Fourth Proportional to 57.12, 79.14 and 56.25

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Solution

The fourth proportional to 57.12, 79.14 and 56.25 is: 77.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.12 : 79.14 = 56.25 : x
  2. Step 2: Convert to fraction form
    57.12/79.14 = 56.25/x
  3. Step 3: Cross multiply
    57.12x = 79.14 × 56.25
  4. Step 4: Simplify right side
    57.12x = 4,451.63
  5. Step 5: Solve for x
    x = 4,451.63/57.12
  6. Step 6: Final answer
    x = 77.93

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These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.