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Finding the Fourth Proportional to 62.96, 86.93 and 51.33

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Solution

The fourth proportional to 62.96, 86.93 and 51.33 is: 70.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.96 : 86.93 = 51.33 : x
  2. Step 2: Convert to fraction form
    62.96/86.93 = 51.33/x
  3. Step 3: Cross multiply
    62.96x = 86.93 × 51.33
  4. Step 4: Simplify right side
    62.96x = 4,462.03
  5. Step 5: Solve for x
    x = 4,462.03/62.96
  6. Step 6: Final answer
    x = 70.87

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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.