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Finding the Fourth Proportional to 113.87, 156.98 and 82.74

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Solution

The fourth proportional to 113.87, 156.98 and 82.74 is: 114.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.87 : 156.98 = 82.74 : x
  2. Step 2: Convert to fraction form
    113.87/156.98 = 82.74/x
  3. Step 3: Cross multiply
    113.87x = 156.98 × 82.74
  4. Step 4: Simplify right side
    113.87x = 12,987.33
  5. Step 5: Solve for x
    x = 12,987.33/113.87
  6. Step 6: Final answer
    x = 114.05

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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.