Home / 81,877.66-122,790.36-31,945.60

Finding the Fourth Proportional to 81,877.66, 122,790.36 and 31,945.60

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Solution

The fourth proportional to 81,877.66, 122,790.36 and 31,945.60 is: 47,908.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,877.66 : 122,790.36 = 31,945.60 : x
  2. Step 2: Convert to fraction form
    81,877.66/122,790.36 = 31,945.60/x
  3. Step 3: Cross multiply
    81,877.66x = 122,790.36 × 31,945.60
  4. Step 4: Simplify right side
    81,877.66x = 3,922,611,724.42
  5. Step 5: Solve for x
    x = 3,922,611,724.42/81,877.66
  6. Step 6: Final answer
    x = 47,908.21

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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.