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Finding the Fourth Proportional to 170,727.20, 256,090.80 and 81,959.30

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Solution

The fourth proportional to 170,727.20, 256,090.80 and 81,959.30 is: 122,938.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,727.20 : 256,090.80 = 81,959.30 : x
  2. Step 2: Convert to fraction form
    170,727.20/256,090.80 = 81,959.30/x
  3. Step 3: Cross multiply
    170,727.20x = 256,090.80 × 81,959.30
  4. Step 4: Simplify right side
    170,727.20x = 20,989,022,704.44
  5. Step 5: Solve for x
    x = 20,989,022,704.44/170,727.20
  6. Step 6: Final answer
    x = 122,938.95

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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.