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Finding the Fourth Proportional to 82.83, 114.08 and 72.47

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Solution

The fourth proportional to 82.83, 114.08 and 72.47 is: 99.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.83 : 114.08 = 72.47 : x
  2. Step 2: Convert to fraction form
    82.83/114.08 = 72.47/x
  3. Step 3: Cross multiply
    82.83x = 114.08 × 72.47
  4. Step 4: Simplify right side
    82.83x = 8,267.30
  5. Step 5: Solve for x
    x = 8,267.30/82.83
  6. Step 6: Final answer
    x = 99.81

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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.