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Finding the Fourth Proportional to 125.85, 188.06 and 103.05

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Solution

The fourth proportional to 125.85, 188.06 and 103.05 is: 153.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.85 : 188.06 = 103.05 : x
  2. Step 2: Convert to fraction form
    125.85/188.06 = 103.05/x
  3. Step 3: Cross multiply
    125.85x = 188.06 × 103.05
  4. Step 4: Simplify right side
    125.85x = 19,379.07
  5. Step 5: Solve for x
    x = 19,379.07/125.85
  6. Step 6: Final answer
    x = 153.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.