Home / 81,868.45-122,839.94-39,725.77

Finding the Fourth Proportional to 81,868.45, 122,839.94 and 39,725.77

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Solution

The fourth proportional to 81,868.45, 122,839.94 and 39,725.77 is: 59,606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,868.45 : 122,839.94 = 39,725.77 : x
  2. Step 2: Convert to fraction form
    81,868.45/122,839.94 = 39,725.77/x
  3. Step 3: Cross multiply
    81,868.45x = 122,839.94 × 39,725.77
  4. Step 4: Simplify right side
    81,868.45x = 4,879,911,203.25
  5. Step 5: Solve for x
    x = 4,879,911,203.25/81,868.45
  6. Step 6: Final answer
    x = 59,606.74

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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.