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Finding the Fourth Proportional to 71,682.30, 98,920.98 and 39,850.92

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Solution

The fourth proportional to 71,682.30, 98,920.98 and 39,850.92 is: 54,993.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,682.30 : 98,920.98 = 39,850.92 : x
  2. Step 2: Convert to fraction form
    71,682.30/98,920.98 = 39,850.92/x
  3. Step 3: Cross multiply
    71,682.30x = 98,920.98 × 39,850.92
  4. Step 4: Simplify right side
    71,682.30x = 3,942,092,060.30
  5. Step 5: Solve for x
    x = 3,942,092,060.30/71,682.30
  6. Step 6: Final answer
    x = 54,993.94

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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.