Home / 81,381.86-122,099.52-51,361.34

Finding the Fourth Proportional to 81,381.86, 122,099.52 and 51,361.34

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Solution

The fourth proportional to 81,381.86, 122,099.52 and 51,361.34 is: 77,058.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.86 : 122,099.52 = 51,361.34 : x
  2. Step 2: Convert to fraction form
    81,381.86/122,099.52 = 51,361.34/x
  3. Step 3: Cross multiply
    81,381.86x = 122,099.52 × 51,361.34
  4. Step 4: Simplify right side
    81,381.86x = 6,271,194,960.56
  5. Step 5: Solve for x
    x = 6,271,194,960.56/81,381.86
  6. Step 6: Final answer
    x = 77,058.88

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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.