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Finding the Fourth Proportional to 82.03, 113.16 and 49.30

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Solution

The fourth proportional to 82.03, 113.16 and 49.30 is: 68.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.03 : 113.16 = 49.30 : x
  2. Step 2: Convert to fraction form
    82.03/113.16 = 49.30/x
  3. Step 3: Cross multiply
    82.03x = 113.16 × 49.30
  4. Step 4: Simplify right side
    82.03x = 5,578.22
  5. Step 5: Solve for x
    x = 5,578.22/82.03
  6. Step 6: Final answer
    x = 68.01

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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.