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Finding the Fourth Proportional to 142.19, 212.94 and 73.47

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Solution

The fourth proportional to 142.19, 212.94 and 73.47 is: 110.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.19 : 212.94 = 73.47 : x
  2. Step 2: Convert to fraction form
    142.19/212.94 = 73.47/x
  3. Step 3: Cross multiply
    142.19x = 212.94 × 73.47
  4. Step 4: Simplify right side
    142.19x = 15,644.70
  5. Step 5: Solve for x
    x = 15,644.70/142.19
  6. Step 6: Final answer
    x = 110.03

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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.