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Finding the Fourth Proportional to 128,020.60, 191,642.10 and 114,023.80

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Solution

The fourth proportional to 128,020.60, 191,642.10 and 114,023.80 is: 170,689.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,020.60 : 191,642.10 = 114,023.80 : x
  2. Step 2: Convert to fraction form
    128,020.60/191,642.10 = 114,023.80/x
  3. Step 3: Cross multiply
    128,020.60x = 191,642.10 × 114,023.80
  4. Step 4: Simplify right side
    128,020.60x = 21,851,760,481.98
  5. Step 5: Solve for x
    x = 21,851,760,481.98/128,020.60
  6. Step 6: Final answer
    x = 170,689.41

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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.