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Finding the Fourth Proportional to 105,344.80, 157,786.80 and 81,786.40

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Solution

The fourth proportional to 105,344.80, 157,786.80 and 81,786.40 is: 122,500.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,344.80 : 157,786.80 = 81,786.40 : x
  2. Step 2: Convert to fraction form
    105,344.80/157,786.80 = 81,786.40/x
  3. Step 3: Cross multiply
    105,344.80x = 157,786.80 × 81,786.40
  4. Step 4: Simplify right side
    105,344.80x = 12,904,814,339.52
  5. Step 5: Solve for x
    x = 12,904,814,339.52/105,344.80
  6. Step 6: Final answer
    x = 122,500.72

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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.