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Finding the Fourth Proportional to 141.80, 212.56 and 73.30

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Solution

The fourth proportional to 141.80, 212.56 and 73.30 is: 109.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.80 : 212.56 = 73.30 : x
  2. Step 2: Convert to fraction form
    141.80/212.56 = 73.30/x
  3. Step 3: Cross multiply
    141.80x = 212.56 × 73.30
  4. Step 4: Simplify right side
    141.80x = 15,580.65
  5. Step 5: Solve for x
    x = 15,580.65/141.80
  6. Step 6: Final answer
    x = 109.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.