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Finding the Fourth Proportional to 98,608.32, 147,785.40 and 85,906.71

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Solution

The fourth proportional to 98,608.32, 147,785.40 and 85,906.71 is: 128,749.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,608.32 : 147,785.40 = 85,906.71 : x
  2. Step 2: Convert to fraction form
    98,608.32/147,785.40 = 85,906.71/x
  3. Step 3: Cross multiply
    98,608.32x = 147,785.40 × 85,906.71
  4. Step 4: Simplify right side
    98,608.32x = 12,695,757,500.03
  5. Step 5: Solve for x
    x = 12,695,757,500.03/98,608.32
  6. Step 6: Final answer
    x = 128,749.35

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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.