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Finding the Fourth Proportional to 67,210.86, 100,830.87 and 20,462.52

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Solution

The fourth proportional to 67,210.86, 100,830.87 and 20,462.52 is: 30,698.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,210.86 : 100,830.87 = 20,462.52 : x
  2. Step 2: Convert to fraction form
    67,210.86/100,830.87 = 20,462.52/x
  3. Step 3: Cross multiply
    67,210.86x = 100,830.87 × 20,462.52
  4. Step 4: Simplify right side
    67,210.86x = 2,063,253,693.99
  5. Step 5: Solve for x
    x = 2,063,253,693.99/67,210.86
  6. Step 6: Final answer
    x = 30,698.22

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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.