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Finding the Fourth Proportional to 142.84, 196.63 and 124.31

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Solution

The fourth proportional to 142.84, 196.63 and 124.31 is: 171.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.84 : 196.63 = 124.31 : x
  2. Step 2: Convert to fraction form
    142.84/196.63 = 124.31/x
  3. Step 3: Cross multiply
    142.84x = 196.63 × 124.31
  4. Step 4: Simplify right side
    142.84x = 24,443.08
  5. Step 5: Solve for x
    x = 24,443.08/142.84
  6. Step 6: Final answer
    x = 171.12

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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.