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Finding the Fourth Proportional to 145.28, 200.48 and 82.26

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Solution

The fourth proportional to 145.28, 200.48 and 82.26 is: 113.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.28 : 200.48 = 82.26 : x
  2. Step 2: Convert to fraction form
    145.28/200.48 = 82.26/x
  3. Step 3: Cross multiply
    145.28x = 200.48 × 82.26
  4. Step 4: Simplify right side
    145.28x = 16,491.69
  5. Step 5: Solve for x
    x = 16,491.69/145.28
  6. Step 6: Final answer
    x = 113.52

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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.