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Finding the Fourth Proportional to 170,520.12, 255,912.12 and 137,321.64

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Solution

The fourth proportional to 170,520.12, 255,912.12 and 137,321.64 is: 206,088.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,520.12 : 255,912.12 = 137,321.64 : x
  2. Step 2: Convert to fraction form
    170,520.12/255,912.12 = 137,321.64/x
  3. Step 3: Cross multiply
    170,520.12x = 255,912.12 × 137,321.64
  4. Step 4: Simplify right side
    170,520.12x = 35,142,272,014.28
  5. Step 5: Solve for x
    x = 35,142,272,014.28/170,520.12
  6. Step 6: Final answer
    x = 206,088.71

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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.