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Finding the Fourth Proportional to 128,882.63, 193,065.26 and 65,700.20

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Solution

The fourth proportional to 128,882.63, 193,065.26 and 65,700.20 is: 98,418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,882.63 : 193,065.26 = 65,700.20 : x
  2. Step 2: Convert to fraction form
    128,882.63/193,065.26 = 65,700.20/x
  3. Step 3: Cross multiply
    128,882.63x = 193,065.26 × 65,700.20
  4. Step 4: Simplify right side
    128,882.63x = 12,684,424,901.22
  5. Step 5: Solve for x
    x = 12,684,424,901.22/128,882.63
  6. Step 6: Final answer
    x = 98,418.42

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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.