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Finding the Fourth Proportional to 67,109.40, 100,404.90 and 43,781.40

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Solution

The fourth proportional to 67,109.40, 100,404.90 and 43,781.40 is: 65,503.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,109.40 : 100,404.90 = 43,781.40 : x
  2. Step 2: Convert to fraction form
    67,109.40/100,404.90 = 43,781.40/x
  3. Step 3: Cross multiply
    67,109.40x = 100,404.90 × 43,781.40
  4. Step 4: Simplify right side
    67,109.40x = 4,395,867,088.86
  5. Step 5: Solve for x
    x = 4,395,867,088.86/67,109.40
  6. Step 6: Final answer
    x = 65,503.00

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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.