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Finding the Fourth Proportional to 57.88, 87.30 and 51.94

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Solution

The fourth proportional to 57.88, 87.30 and 51.94 is: 78.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.88 : 87.30 = 51.94 : x
  2. Step 2: Convert to fraction form
    57.88/87.30 = 51.94/x
  3. Step 3: Cross multiply
    57.88x = 87.30 × 51.94
  4. Step 4: Simplify right side
    57.88x = 4,534.36
  5. Step 5: Solve for x
    x = 4,534.36/57.88
  6. Step 6: Final answer
    x = 78.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.