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Finding the Fourth Proportional to 81,144.56, 111,977.42 and 45,334.84

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Solution

The fourth proportional to 81,144.56, 111,977.42 and 45,334.84 is: 62,560.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,144.56 : 111,977.42 = 45,334.84 : x
  2. Step 2: Convert to fraction form
    81,144.56/111,977.42 = 45,334.84/x
  3. Step 3: Cross multiply
    81,144.56x = 111,977.42 × 45,334.84
  4. Step 4: Simplify right side
    81,144.56x = 5,076,477,972.76
  5. Step 5: Solve for x
    x = 5,076,477,972.76/81,144.56
  6. Step 6: Final answer
    x = 62,560.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.