Home / 87,120.50-120,207.75-51,297.44

Finding the Fourth Proportional to 87,120.50, 120,207.75 and 51,297.44

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Solution

The fourth proportional to 87,120.50, 120,207.75 and 51,297.44 is: 70,779.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120.50 : 120,207.75 = 51,297.44 : x
  2. Step 2: Convert to fraction form
    87,120.50/120,207.75 = 51,297.44/x
  3. Step 3: Cross multiply
    87,120.50x = 120,207.75 × 51,297.44
  4. Step 4: Simplify right side
    87,120.50x = 6,166,349,843.16
  5. Step 5: Solve for x
    x = 6,166,349,843.16/87,120.50
  6. Step 6: Final answer
    x = 70,779.55

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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.