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Finding the Fourth Proportional to 63.58, 87.36 and 51.89

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Solution

The fourth proportional to 63.58, 87.36 and 51.89 is: 71.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.58 : 87.36 = 51.89 : x
  2. Step 2: Convert to fraction form
    63.58/87.36 = 51.89/x
  3. Step 3: Cross multiply
    63.58x = 87.36 × 51.89
  4. Step 4: Simplify right side
    63.58x = 4,532.85
  5. Step 5: Solve for x
    x = 4,532.85/63.58
  6. Step 6: Final answer
    x = 71.30

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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.