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Finding the Fourth Proportional to 188.28, 259.96 and 142.10

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Solution

The fourth proportional to 188.28, 259.96 and 142.10 is: 196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.28 : 259.96 = 142.10 : x
  2. Step 2: Convert to fraction form
    188.28/259.96 = 142.10/x
  3. Step 3: Cross multiply
    188.28x = 259.96 × 142.10
  4. Step 4: Simplify right side
    188.28x = 36,940.32
  5. Step 5: Solve for x
    x = 36,940.32/188.28
  6. Step 6: Final answer
    x = 196.20

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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.