Home / 84,721.80-126,936.90-55,124.40

Finding the Fourth Proportional to 84,721.80, 126,936.90 and 55,124.40

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Solution

The fourth proportional to 84,721.80, 126,936.90 and 55,124.40 is: 82,591.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,721.80 : 126,936.90 = 55,124.40 : x
  2. Step 2: Convert to fraction form
    84,721.80/126,936.90 = 55,124.40/x
  3. Step 3: Cross multiply
    84,721.80x = 126,936.90 × 55,124.40
  4. Step 4: Simplify right side
    84,721.80x = 6,997,320,450.36
  5. Step 5: Solve for x
    x = 6,997,320,450.36/84,721.80
  6. Step 6: Final answer
    x = 82,591.73

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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.