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Finding the Fourth Proportional to 72,843.37, 109,265.76 and 20,256.95

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Solution

The fourth proportional to 72,843.37, 109,265.76 and 20,256.95 is: 30,385.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,843.37 : 109,265.76 = 20,256.95 : x
  2. Step 2: Convert to fraction form
    72,843.37/109,265.76 = 20,256.95/x
  3. Step 3: Cross multiply
    72,843.37x = 109,265.76 × 20,256.95
  4. Step 4: Simplify right side
    72,843.37x = 2,213,391,310.20
  5. Step 5: Solve for x
    x = 2,213,391,310.20/72,843.37
  6. Step 6: Final answer
    x = 30,385.63

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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.