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Finding the Fourth Proportional to 67,066.74, 100,615.68 and 19,679.90

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Solution

The fourth proportional to 67,066.74, 100,615.68 and 19,679.90 is: 29,524.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,066.74 : 100,615.68 = 19,679.90 : x
  2. Step 2: Convert to fraction form
    67,066.74/100,615.68 = 19,679.90/x
  3. Step 3: Cross multiply
    67,066.74x = 100,615.68 × 19,679.90
  4. Step 4: Simplify right side
    67,066.74x = 1,980,106,520.83
  5. Step 5: Solve for x
    x = 1,980,106,520.83/67,066.74
  6. Step 6: Final answer
    x = 29,524.42

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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.