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Finding the Fourth Proportional to 81,372.80, 122,076.63 and 25,211.67

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Solution

The fourth proportional to 81,372.80, 122,076.63 and 25,211.67 is: 37,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,372.80 : 122,076.63 = 25,211.67 : x
  2. Step 2: Convert to fraction form
    81,372.80/122,076.63 = 25,211.67/x
  3. Step 3: Cross multiply
    81,372.80x = 122,076.63 × 25,211.67
  4. Step 4: Simplify right side
    81,372.80x = 3,077,755,459.61
  5. Step 5: Solve for x
    x = 3,077,755,459.61/81,372.80
  6. Step 6: Final answer
    x = 37,822.90

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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.