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Finding the Fourth Proportional to 188.58, 260.60 and 136.30

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Solution

The fourth proportional to 188.58, 260.60 and 136.30 is: 188.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.58 : 260.60 = 136.30 : x
  2. Step 2: Convert to fraction form
    188.58/260.60 = 136.30/x
  3. Step 3: Cross multiply
    188.58x = 260.60 × 136.30
  4. Step 4: Simplify right side
    188.58x = 35,519.13
  5. Step 5: Solve for x
    x = 35,519.13/188.58
  6. Step 6: Final answer
    x = 188.35

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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.