Home / 81,823.37-122,735.05-45,120.65

Finding the Fourth Proportional to 81,823.37, 122,735.05 and 45,120.65

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Solution

The fourth proportional to 81,823.37, 122,735.05 and 45,120.65 is: 67,680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,823.37 : 122,735.05 = 45,120.65 : x
  2. Step 2: Convert to fraction form
    81,823.37/122,735.05 = 45,120.65/x
  3. Step 3: Cross multiply
    81,823.37x = 122,735.05 × 45,120.65
  4. Step 4: Simplify right side
    81,823.37x = 5,537,884,507.31
  5. Step 5: Solve for x
    x = 5,537,884,507.31/81,823.37
  6. Step 6: Final answer
    x = 67,680.97

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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.