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Finding the Fourth Proportional to 72,755.74, 109,132.80 and 20,163.28

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Solution

The fourth proportional to 72,755.74, 109,132.80 and 20,163.28 is: 30,244.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,755.74 : 109,132.80 = 20,163.28 : x
  2. Step 2: Convert to fraction form
    72,755.74/109,132.80 = 20,163.28/x
  3. Step 3: Cross multiply
    72,755.74x = 109,132.80 × 20,163.28
  4. Step 4: Simplify right side
    72,755.74x = 2,200,475,203.58
  5. Step 5: Solve for x
    x = 2,200,475,203.58/72,755.74
  6. Step 6: Final answer
    x = 30,244.70

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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.