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Finding the Fourth Proportional to 142.33, 196.34 and 98.07

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Solution

The fourth proportional to 142.33, 196.34 and 98.07 is: 135.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.33 : 196.34 = 98.07 : x
  2. Step 2: Convert to fraction form
    142.33/196.34 = 98.07/x
  3. Step 3: Cross multiply
    142.33x = 196.34 × 98.07
  4. Step 4: Simplify right side
    142.33x = 19,253.59
  5. Step 5: Solve for x
    x = 19,253.59/142.33
  6. Step 6: Final answer
    x = 135.27

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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.