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Finding the Fourth Proportional to 71,678.57, 98,922.41 and 39,850.43

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Solution

The fourth proportional to 71,678.57, 98,922.41 and 39,850.43 is: 54,996.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,678.57 : 98,922.41 = 39,850.43 : x
  2. Step 2: Convert to fraction form
    71,678.57/98,922.41 = 39,850.43/x
  3. Step 3: Cross multiply
    71,678.57x = 98,922.41 × 39,850.43
  4. Step 4: Simplify right side
    71,678.57x = 3,942,099,881.27
  5. Step 5: Solve for x
    x = 3,942,099,881.27/71,678.57
  6. Step 6: Final answer
    x = 54,996.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.