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Finding the Fourth Proportional to 85,786.80, 128,766.60 and 41,449.20

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Solution

The fourth proportional to 85,786.80, 128,766.60 and 41,449.20 is: 62,215.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,786.80 : 128,766.60 = 41,449.20 : x
  2. Step 2: Convert to fraction form
    85,786.80/128,766.60 = 41,449.20/x
  3. Step 3: Cross multiply
    85,786.80x = 128,766.60 × 41,449.20
  4. Step 4: Simplify right side
    85,786.80x = 5,337,272,556.72
  5. Step 5: Solve for x
    x = 5,337,272,556.72/85,786.80
  6. Step 6: Final answer
    x = 62,215.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.