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Finding the Fourth Proportional to 67,155.80, 100,699.03 and 19,764.74

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Solution

The fourth proportional to 67,155.80, 100,699.03 and 19,764.74 is: 29,636.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,155.80 : 100,699.03 = 19,764.74 : x
  2. Step 2: Convert to fraction form
    67,155.80/100,699.03 = 19,764.74/x
  3. Step 3: Cross multiply
    67,155.80x = 100,699.03 × 19,764.74
  4. Step 4: Simplify right side
    67,155.80x = 1,990,290,146.20
  5. Step 5: Solve for x
    x = 1,990,290,146.20/67,155.80
  6. Step 6: Final answer
    x = 29,636.91

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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.