Home / 81,336.35-121,906.11-36,918.38

Finding the Fourth Proportional to 81,336.35, 121,906.11 and 36,918.38

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Solution

The fourth proportional to 81,336.35, 121,906.11 and 36,918.38 is: 55,332.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,336.35 : 121,906.11 = 36,918.38 : x
  2. Step 2: Convert to fraction form
    81,336.35/121,906.11 = 36,918.38/x
  3. Step 3: Cross multiply
    81,336.35x = 121,906.11 × 36,918.38
  4. Step 4: Simplify right side
    81,336.35x = 4,500,576,093.30
  5. Step 5: Solve for x
    x = 4,500,576,093.30/81,336.35
  6. Step 6: Final answer
    x = 55,332.90

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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.