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Finding the Fourth Proportional to 125.10, 188.61 and 113.38

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Solution

The fourth proportional to 125.10, 188.61 and 113.38 is: 170.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.10 : 188.61 = 113.38 : x
  2. Step 2: Convert to fraction form
    125.10/188.61 = 113.38/x
  3. Step 3: Cross multiply
    125.10x = 188.61 × 113.38
  4. Step 4: Simplify right side
    125.10x = 21,384.60
  5. Step 5: Solve for x
    x = 21,384.60/125.10
  6. Step 6: Final answer
    x = 170.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.