Home / 100,283.20-138,311.09-85,225.70

Finding the Fourth Proportional to 100,283.20, 138,311.09 and 85,225.70

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Solution

The fourth proportional to 100,283.20, 138,311.09 and 85,225.70 is: 117,543.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,283.20 : 138,311.09 = 85,225.70 : x
  2. Step 2: Convert to fraction form
    100,283.20/138,311.09 = 85,225.70/x
  3. Step 3: Cross multiply
    100,283.20x = 138,311.09 × 85,225.70
  4. Step 4: Simplify right side
    100,283.20x = 11,787,659,463.01
  5. Step 5: Solve for x
    x = 11,787,659,463.01/100,283.20
  6. Step 6: Final answer
    x = 117,543.71

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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.