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Finding the Fourth Proportional to 87,447.35, 120,676.84 and 49,721.60

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Solution

The fourth proportional to 87,447.35, 120,676.84 and 49,721.60 is: 68,615.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,447.35 : 120,676.84 = 49,721.60 : x
  2. Step 2: Convert to fraction form
    87,447.35/120,676.84 = 49,721.60/x
  3. Step 3: Cross multiply
    87,447.35x = 120,676.84 × 49,721.60
  4. Step 4: Simplify right side
    87,447.35x = 6,000,245,066.32
  5. Step 5: Solve for x
    x = 6,000,245,066.32/87,447.35
  6. Step 6: Final answer
    x = 68,615.52

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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.