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Finding the Fourth Proportional to 71,451.88, 98,603.04 and 39,620.86

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Solution

The fourth proportional to 71,451.88, 98,603.04 and 39,620.86 is: 54,676.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,451.88 : 98,603.04 = 39,620.86 : x
  2. Step 2: Convert to fraction form
    71,451.88/98,603.04 = 39,620.86/x
  3. Step 3: Cross multiply
    71,451.88x = 98,603.04 × 39,620.86
  4. Step 4: Simplify right side
    71,451.88x = 3,906,737,243.41
  5. Step 5: Solve for x
    x = 3,906,737,243.41/71,451.88
  6. Step 6: Final answer
    x = 54,676.48

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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.