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Finding the Fourth Proportional to 128,882.88, 193,065.63 and 65,700.45

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Solution

The fourth proportional to 128,882.88, 193,065.63 and 65,700.45 is: 98,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,882.88 : 193,065.63 = 65,700.45 : x
  2. Step 2: Convert to fraction form
    128,882.88/193,065.63 = 65,700.45/x
  3. Step 3: Cross multiply
    128,882.88x = 193,065.63 × 65,700.45
  4. Step 4: Simplify right side
    128,882.88x = 12,684,498,770.53
  5. Step 5: Solve for x
    x = 12,684,498,770.53/128,882.88
  6. Step 6: Final answer
    x = 98,418.80

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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.