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Finding the Fourth Proportional to 128,080.86, 192,121.29 and 43,842.12

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Solution

The fourth proportional to 128,080.86, 192,121.29 and 43,842.12 is: 65,763.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,080.86 : 192,121.29 = 43,842.12 : x
  2. Step 2: Convert to fraction form
    128,080.86/192,121.29 = 43,842.12/x
  3. Step 3: Cross multiply
    128,080.86x = 192,121.29 × 43,842.12
  4. Step 4: Simplify right side
    128,080.86x = 8,423,004,650.73
  5. Step 5: Solve for x
    x = 8,423,004,650.73/128,080.86
  6. Step 6: Final answer
    x = 65,763.18

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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.