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Finding the Fourth Proportional to 72,998.96, 109,498.53 and 20,408.39

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Solution

The fourth proportional to 72,998.96, 109,498.53 and 20,408.39 is: 30,612.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,998.96 : 109,498.53 = 20,408.39 : x
  2. Step 2: Convert to fraction form
    72,998.96/109,498.53 = 20,408.39/x
  3. Step 3: Cross multiply
    72,998.96x = 109,498.53 × 20,408.39
  4. Step 4: Simplify right side
    72,998.96x = 2,234,688,644.33
  5. Step 5: Solve for x
    x = 2,234,688,644.33/72,998.96
  6. Step 6: Final answer
    x = 30,612.61

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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.