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Finding the Fourth Proportional to 145.20, 200.41 and 83.07

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Solution

The fourth proportional to 145.20, 200.41 and 83.07 is: 114.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.20 : 200.41 = 83.07 : x
  2. Step 2: Convert to fraction form
    145.20/200.41 = 83.07/x
  3. Step 3: Cross multiply
    145.20x = 200.41 × 83.07
  4. Step 4: Simplify right side
    145.20x = 16,647.85
  5. Step 5: Solve for x
    x = 16,647.85/145.20
  6. Step 6: Final answer
    x = 114.65

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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.