Home / 100,282.20-138,309.71-85,224.70

Finding the Fourth Proportional to 100,282.20, 138,309.71 and 85,224.70

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Solution

The fourth proportional to 100,282.20, 138,309.71 and 85,224.70 is: 117,542.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,282.20 : 138,309.71 = 85,224.70 : x
  2. Step 2: Convert to fraction form
    100,282.20/138,309.71 = 85,224.70/x
  3. Step 3: Cross multiply
    100,282.20x = 138,309.71 × 85,224.70
  4. Step 4: Simplify right side
    100,282.20x = 11,787,403,767.99
  5. Step 5: Solve for x
    x = 11,787,403,767.99/100,282.20
  6. Step 6: Final answer
    x = 117,542.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.