Home / 81,112.38-121,668.57-25,708.38

Finding the Fourth Proportional to 81,112.38, 121,668.57 and 25,708.38

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Solution

The fourth proportional to 81,112.38, 121,668.57 and 25,708.38 is: 38,562.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,112.38 : 121,668.57 = 25,708.38 : x
  2. Step 2: Convert to fraction form
    81,112.38/121,668.57 = 25,708.38/x
  3. Step 3: Cross multiply
    81,112.38x = 121,668.57 × 25,708.38
  4. Step 4: Simplify right side
    81,112.38x = 3,127,901,094.73
  5. Step 5: Solve for x
    x = 3,127,901,094.73/81,112.38
  6. Step 6: Final answer
    x = 38,562.56

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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.