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Finding the Fourth Proportional to 142.63, 196.65 and 93.43

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Solution

The fourth proportional to 142.63, 196.65 and 93.43 is: 128.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.63 : 196.65 = 93.43 : x
  2. Step 2: Convert to fraction form
    142.63/196.65 = 93.43/x
  3. Step 3: Cross multiply
    142.63x = 196.65 × 93.43
  4. Step 4: Simplify right side
    142.63x = 18,373.01
  5. Step 5: Solve for x
    x = 18,373.01/142.63
  6. Step 6: Final answer
    x = 128.82

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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.