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Finding the Fourth Proportional to 142.08, 196.12 and 92.98

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Solution

The fourth proportional to 142.08, 196.12 and 92.98 is: 128.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.08 : 196.12 = 92.98 : x
  2. Step 2: Convert to fraction form
    142.08/196.12 = 92.98/x
  3. Step 3: Cross multiply
    142.08x = 196.12 × 92.98
  4. Step 4: Simplify right side
    142.08x = 18,235.24
  5. Step 5: Solve for x
    x = 18,235.24/142.08
  6. Step 6: Final answer
    x = 128.34

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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.