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Finding the Fourth Proportional to 62.88, 93.96 and 51.42

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Solution

The fourth proportional to 62.88, 93.96 and 51.42 is: 76.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.88 : 93.96 = 51.42 : x
  2. Step 2: Convert to fraction form
    62.88/93.96 = 51.42/x
  3. Step 3: Cross multiply
    62.88x = 93.96 × 51.42
  4. Step 4: Simplify right side
    62.88x = 4,831.42
  5. Step 5: Solve for x
    x = 4,831.42/62.88
  6. Step 6: Final answer
    x = 76.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.