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Finding the Fourth Proportional to 142.73, 213.98 and 70.53

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Solution

The fourth proportional to 142.73, 213.98 and 70.53 is: 105.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.73 : 213.98 = 70.53 : x
  2. Step 2: Convert to fraction form
    142.73/213.98 = 70.53/x
  3. Step 3: Cross multiply
    142.73x = 213.98 × 70.53
  4. Step 4: Simplify right side
    142.73x = 15,092.01
  5. Step 5: Solve for x
    x = 15,092.01/142.73
  6. Step 6: Final answer
    x = 105.74

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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.