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Finding the Fourth Proportional to 141.56, 212.28 and 73.12

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Solution

The fourth proportional to 141.56, 212.28 and 73.12 is: 109.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.56 : 212.28 = 73.12 : x
  2. Step 2: Convert to fraction form
    141.56/212.28 = 73.12/x
  3. Step 3: Cross multiply
    141.56x = 212.28 × 73.12
  4. Step 4: Simplify right side
    141.56x = 15,521.91
  5. Step 5: Solve for x
    x = 15,521.91/141.56
  6. Step 6: Final answer
    x = 109.65

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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.