Home / 81,085.20-121,570.20-36,733.20

Finding the Fourth Proportional to 81,085.20, 121,570.20 and 36,733.20

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Solution

The fourth proportional to 81,085.20, 121,570.20 and 36,733.20 is: 55,073.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,085.20 : 121,570.20 = 36,733.20 : x
  2. Step 2: Convert to fraction form
    81,085.20/121,570.20 = 36,733.20/x
  3. Step 3: Cross multiply
    81,085.20x = 121,570.20 × 36,733.20
  4. Step 4: Simplify right side
    81,085.20x = 4,465,662,470.64
  5. Step 5: Solve for x
    x = 4,465,662,470.64/81,085.20
  6. Step 6: Final answer
    x = 55,073.71

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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.