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Finding the Fourth Proportional to 57,937.80, 86,906.70 and 40,120.20

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Solution

The fourth proportional to 57,937.80, 86,906.70 and 40,120.20 is: 60,180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,937.80 : 86,906.70 = 40,120.20 : x
  2. Step 2: Convert to fraction form
    57,937.80/86,906.70 = 40,120.20/x
  3. Step 3: Cross multiply
    57,937.80x = 86,906.70 × 40,120.20
  4. Step 4: Simplify right side
    57,937.80x = 3,486,714,185.34
  5. Step 5: Solve for x
    x = 3,486,714,185.34/57,937.80
  6. Step 6: Final answer
    x = 60,180.30

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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.