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Finding the Fourth Proportional to 51.08, 70.27 and 49.86

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Solution

The fourth proportional to 51.08, 70.27 and 49.86 is: 68.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.08 : 70.27 = 49.86 : x
  2. Step 2: Convert to fraction form
    51.08/70.27 = 49.86/x
  3. Step 3: Cross multiply
    51.08x = 70.27 × 49.86
  4. Step 4: Simplify right side
    51.08x = 3,503.54
  5. Step 5: Solve for x
    x = 3,503.54/51.08
  6. Step 6: Final answer
    x = 68.60

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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.