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Finding the Fourth Proportional to 67,308.84, 100,767.78 and 39,143.01

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Solution

The fourth proportional to 67,308.84, 100,767.78 and 39,143.01 is: 58,600.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,308.84 : 100,767.78 = 39,143.01 : x
  2. Step 2: Convert to fraction form
    67,308.84/100,767.78 = 39,143.01/x
  3. Step 3: Cross multiply
    67,308.84x = 100,767.78 × 39,143.01
  4. Step 4: Simplify right side
    67,308.84x = 3,944,354,220.22
  5. Step 5: Solve for x
    x = 3,944,354,220.22/67,308.84
  6. Step 6: Final answer
    x = 58,600.83

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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.