Home / 81,480.20-122,221.80-25,319.85

Finding the Fourth Proportional to 81,480.20, 122,221.80 and 25,319.85

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Solution

The fourth proportional to 81,480.20, 122,221.80 and 25,319.85 is: 37,980.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,480.20 : 122,221.80 = 25,319.85 : x
  2. Step 2: Convert to fraction form
    81,480.20/122,221.80 = 25,319.85/x
  3. Step 3: Cross multiply
    81,480.20x = 122,221.80 × 25,319.85
  4. Step 4: Simplify right side
    81,480.20x = 3,094,637,642.73
  5. Step 5: Solve for x
    x = 3,094,637,642.73/81,480.20
  6. Step 6: Final answer
    x = 37,980.24

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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.