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Finding the Fourth Proportional to 121,372.70, 181,961.85 and 51,194.30

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Solution

The fourth proportional to 121,372.70, 181,961.85 and 51,194.30 is: 76,750.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,372.70 : 181,961.85 = 51,194.30 : x
  2. Step 2: Convert to fraction form
    121,372.70/181,961.85 = 51,194.30/x
  3. Step 3: Cross multiply
    121,372.70x = 181,961.85 × 51,194.30
  4. Step 4: Simplify right side
    121,372.70x = 9,315,409,537.46
  5. Step 5: Solve for x
    x = 9,315,409,537.46/121,372.70
  6. Step 6: Final answer
    x = 76,750.45

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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.