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Finding the Fourth Proportional to 72,671.50, 108,994.65 and 20,066.86

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Solution

The fourth proportional to 72,671.50, 108,994.65 and 20,066.86 is: 30,096.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,671.50 : 108,994.65 = 20,066.86 : x
  2. Step 2: Convert to fraction form
    72,671.50/108,994.65 = 20,066.86/x
  3. Step 3: Cross multiply
    72,671.50x = 108,994.65 × 20,066.86
  4. Step 4: Simplify right side
    72,671.50x = 2,187,180,382.30
  5. Step 5: Solve for x
    x = 2,187,180,382.30/72,671.50
  6. Step 6: Final answer
    x = 30,096.81

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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.