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Finding the Fourth Proportional to 72,763.92, 109,149.12 and 20,172.24

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Solution

The fourth proportional to 72,763.92, 109,149.12 and 20,172.24 is: 30,259.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,763.92 : 109,149.12 = 20,172.24 : x
  2. Step 2: Convert to fraction form
    72,763.92/109,149.12 = 20,172.24/x
  3. Step 3: Cross multiply
    72,763.92x = 109,149.12 × 20,172.24
  4. Step 4: Simplify right side
    72,763.92x = 2,201,782,244.43
  5. Step 5: Solve for x
    x = 2,201,782,244.43/72,763.92
  6. Step 6: Final answer
    x = 30,259.26

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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.