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Finding the Fourth Proportional to 72,836.62, 109,255.64 and 20,250.20

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Solution

The fourth proportional to 72,836.62, 109,255.64 and 20,250.20 is: 30,375.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,836.62 : 109,255.64 = 20,250.20 : x
  2. Step 2: Convert to fraction form
    72,836.62/109,255.64 = 20,250.20/x
  3. Step 3: Cross multiply
    72,836.62x = 109,255.64 × 20,250.20
  4. Step 4: Simplify right side
    72,836.62x = 2,212,448,733.02
  5. Step 5: Solve for x
    x = 2,212,448,733.02/72,836.62
  6. Step 6: Final answer
    x = 30,375.50

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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.