Home / 81,291.42-121,948.76-25,135.88

Finding the Fourth Proportional to 81,291.42, 121,948.76 and 25,135.88

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Solution

The fourth proportional to 81,291.42, 121,948.76 and 25,135.88 is: 37,707.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,291.42 : 121,948.76 = 25,135.88 : x
  2. Step 2: Convert to fraction form
    81,291.42/121,948.76 = 25,135.88/x
  3. Step 3: Cross multiply
    81,291.42x = 121,948.76 × 25,135.88
  4. Step 4: Simplify right side
    81,291.42x = 3,065,288,662.09
  5. Step 5: Solve for x
    x = 3,065,288,662.09/81,291.42
  6. Step 6: Final answer
    x = 37,707.41

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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.