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Finding the Fourth Proportional to 72,730.89, 109,098.86 and 20,144.25

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Solution

The fourth proportional to 72,730.89, 109,098.86 and 20,144.25 is: 30,217.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,730.89 : 109,098.86 = 20,144.25 : x
  2. Step 2: Convert to fraction form
    72,730.89/109,098.86 = 20,144.25/x
  3. Step 3: Cross multiply
    72,730.89x = 109,098.86 × 20,144.25
  4. Step 4: Simplify right side
    72,730.89x = 2,197,714,609.83
  5. Step 5: Solve for x
    x = 2,197,714,609.83/72,730.89
  6. Step 6: Final answer
    x = 30,217.07

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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.