Home / 89,205.12-133,963.20-81,912.96

Finding the Fourth Proportional to 89,205.12, 133,963.20 and 81,912.96

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Solution

The fourth proportional to 89,205.12, 133,963.20 and 81,912.96 is: 123,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,205.12 : 133,963.20 = 81,912.96 : x
  2. Step 2: Convert to fraction form
    89,205.12/133,963.20 = 81,912.96/x
  3. Step 3: Cross multiply
    89,205.12x = 133,963.20 × 81,912.96
  4. Step 4: Simplify right side
    89,205.12x = 10,973,322,243.07
  5. Step 5: Solve for x
    x = 10,973,322,243.07/89,205.12
  6. Step 6: Final answer
    x = 123,012.25

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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.