Home / 81,778.56-122,715.44-34,390.20

Finding the Fourth Proportional to 81,778.56, 122,715.44 and 34,390.20

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Solution

The fourth proportional to 81,778.56, 122,715.44 and 34,390.20 is: 51,605.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,778.56 : 122,715.44 = 34,390.20 : x
  2. Step 2: Convert to fraction form
    81,778.56/122,715.44 = 34,390.20/x
  3. Step 3: Cross multiply
    81,778.56x = 122,715.44 × 34,390.20
  4. Step 4: Simplify right side
    81,778.56x = 4,220,208,524.69
  5. Step 5: Solve for x
    x = 4,220,208,524.69/81,778.56
  6. Step 6: Final answer
    x = 51,605.32

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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.