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Finding the Fourth Proportional to 188.51, 260.11 and 126.43

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Solution

The fourth proportional to 188.51, 260.11 and 126.43 is: 174.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.51 : 260.11 = 126.43 : x
  2. Step 2: Convert to fraction form
    188.51/260.11 = 126.43/x
  3. Step 3: Cross multiply
    188.51x = 260.11 × 126.43
  4. Step 4: Simplify right side
    188.51x = 32,885.71
  5. Step 5: Solve for x
    x = 32,885.71/188.51
  6. Step 6: Final answer
    x = 174.45

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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.