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Finding the Fourth Proportional to 145.20, 200.30 and 141.56

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Solution

The fourth proportional to 145.20, 200.30 and 141.56 is: 195.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.20 : 200.30 = 141.56 : x
  2. Step 2: Convert to fraction form
    145.20/200.30 = 141.56/x
  3. Step 3: Cross multiply
    145.20x = 200.30 × 141.56
  4. Step 4: Simplify right side
    145.20x = 28,352.76
  5. Step 5: Solve for x
    x = 28,352.76/145.20
  6. Step 6: Final answer
    x = 195.27

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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.