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Finding the Fourth Proportional to 188.30, 260.10 and 129.23

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Solution

The fourth proportional to 188.30, 260.10 and 129.23 is: 178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.30 : 260.10 = 129.23 : x
  2. Step 2: Convert to fraction form
    188.30/260.10 = 129.23/x
  3. Step 3: Cross multiply
    188.30x = 260.10 × 129.23
  4. Step 4: Simplify right side
    188.30x = 33,611.42
  5. Step 5: Solve for x
    x = 33,611.42/188.30
  6. Step 6: Final answer
    x = 178.50

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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.