Home / 68,380.64-94,366.16-40,079.20

Finding the Fourth Proportional to 68,380.64, 94,366.16 and 40,079.20

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Solution

The fourth proportional to 68,380.64, 94,366.16 and 40,079.20 is: 55,309.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,380.64 : 94,366.16 = 40,079.20 : x
  2. Step 2: Convert to fraction form
    68,380.64/94,366.16 = 40,079.20/x
  3. Step 3: Cross multiply
    68,380.64x = 94,366.16 × 40,079.20
  4. Step 4: Simplify right side
    68,380.64x = 3,782,120,199.87
  5. Step 5: Solve for x
    x = 3,782,120,199.87/68,380.64
  6. Step 6: Final answer
    x = 55,309.81

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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.