Home / 81,036.43-121,553.67-21,059.59

Finding the Fourth Proportional to 81,036.43, 121,553.67 and 21,059.59

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Solution

The fourth proportional to 81,036.43, 121,553.67 and 21,059.59 is: 31,589.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,036.43 : 121,553.67 = 21,059.59 : x
  2. Step 2: Convert to fraction form
    81,036.43/121,553.67 = 21,059.59/x
  3. Step 3: Cross multiply
    81,036.43x = 121,553.67 × 21,059.59
  4. Step 4: Simplify right side
    81,036.43x = 2,559,870,453.20
  5. Step 5: Solve for x
    x = 2,559,870,453.20/81,036.43
  6. Step 6: Final answer
    x = 31,589.13

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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.