Home / 81,303.35-121,958.15-25,138.40

Finding the Fourth Proportional to 81,303.35, 121,958.15 and 25,138.40

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Solution

The fourth proportional to 81,303.35, 121,958.15 and 25,138.40 is: 37,708.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,303.35 : 121,958.15 = 25,138.40 : x
  2. Step 2: Convert to fraction form
    81,303.35/121,958.15 = 25,138.40/x
  3. Step 3: Cross multiply
    81,303.35x = 121,958.15 × 25,138.40
  4. Step 4: Simplify right side
    81,303.35x = 3,065,832,022.48
  5. Step 5: Solve for x
    x = 3,065,832,022.48/81,303.35
  6. Step 6: Final answer
    x = 37,708.56

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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.