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Finding the Fourth Proportional to 128,037.80, 192,050.30 and 65,714.60

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Solution

The fourth proportional to 128,037.80, 192,050.30 and 65,714.60 is: 98,568.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,037.80 : 192,050.30 = 65,714.60 : x
  2. Step 2: Convert to fraction form
    128,037.80/192,050.30 = 65,714.60/x
  3. Step 3: Cross multiply
    128,037.80x = 192,050.30 × 65,714.60
  4. Step 4: Simplify right side
    128,037.80x = 12,620,508,644.38
  5. Step 5: Solve for x
    x = 12,620,508,644.38/128,037.80
  6. Step 6: Final answer
    x = 98,568.62

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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.