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Finding the Fourth Proportional to 125,161, 187,739.46 and 30,391.96

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Solution

The fourth proportional to 125,161, 187,739.46 and 30,391.96 is: 45,587.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,161 : 187,739.46 = 30,391.96 : x
  2. Step 2: Convert to fraction form
    125,161/187,739.46 = 30,391.96/x
  3. Step 3: Cross multiply
    125,161x = 187,739.46 × 30,391.96
  4. Step 4: Simplify right side
    125,161x = 5,705,770,158.74
  5. Step 5: Solve for x
    x = 5,705,770,158.74/125,161
  6. Step 6: Final answer
    x = 45,587.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.