Home / 81,291.20-121,940.03-25,126.30

Finding the Fourth Proportional to 81,291.20, 121,940.03 and 25,126.30

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Solution

The fourth proportional to 81,291.20, 121,940.03 and 25,126.30 is: 37,690.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,291.20 : 121,940.03 = 25,126.30 : x
  2. Step 2: Convert to fraction form
    81,291.20/121,940.03 = 25,126.30/x
  3. Step 3: Cross multiply
    81,291.20x = 121,940.03 × 25,126.30
  4. Step 4: Simplify right side
    81,291.20x = 3,063,901,991.03
  5. Step 5: Solve for x
    x = 3,063,901,991.03/81,291.20
  6. Step 6: Final answer
    x = 37,690.45

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Similar ratio
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1.5x scale

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.