Home / 72,661.20-108,998.04-20,070.68

Finding the Fourth Proportional to 72,661.20, 108,998.04 and 20,070.68

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Solution

The fourth proportional to 72,661.20, 108,998.04 and 20,070.68 is: 30,107.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,661.20 : 108,998.04 = 20,070.68 : x
  2. Step 2: Convert to fraction form
    72,661.20/108,998.04 = 20,070.68/x
  3. Step 3: Cross multiply
    72,661.20x = 108,998.04 × 20,070.68
  4. Step 4: Simplify right side
    72,661.20x = 2,187,664,781.47
  5. Step 5: Solve for x
    x = 2,187,664,781.47/72,661.20
  6. Step 6: Final answer
    x = 30,107.74

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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.