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Finding the Fourth Proportional to 81,720.78, 122,577.84 and 22,554.93

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Solution

The fourth proportional to 81,720.78, 122,577.84 and 22,554.93 is: 33,831.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.78 : 122,577.84 = 22,554.93 : x
  2. Step 2: Convert to fraction form
    81,720.78/122,577.84 = 22,554.93/x
  3. Step 3: Cross multiply
    81,720.78x = 122,577.84 × 22,554.93
  4. Step 4: Simplify right side
    81,720.78x = 2,764,734,600.75
  5. Step 5: Solve for x
    x = 2,764,734,600.75/81,720.78
  6. Step 6: Final answer
    x = 33,831.48

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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.