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Finding the Fourth Proportional to 81,790.98, 122,686.32 and 25,635.40

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Solution

The fourth proportional to 81,790.98, 122,686.32 and 25,635.40 is: 38,453.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,790.98 : 122,686.32 = 25,635.40 : x
  2. Step 2: Convert to fraction form
    81,790.98/122,686.32 = 25,635.40/x
  3. Step 3: Cross multiply
    81,790.98x = 122,686.32 × 25,635.40
  4. Step 4: Simplify right side
    81,790.98x = 3,145,112,887.73
  5. Step 5: Solve for x
    x = 3,145,112,887.73/81,790.98
  6. Step 6: Final answer
    x = 38,453.05

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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.