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Finding the Fourth Proportional to 98,285.40, 147,209.40 and 85,163.40

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Solution

The fourth proportional to 98,285.40, 147,209.40 and 85,163.40 is: 127,555.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,285.40 : 147,209.40 = 85,163.40 : x
  2. Step 2: Convert to fraction form
    98,285.40/147,209.40 = 85,163.40/x
  3. Step 3: Cross multiply
    98,285.40x = 147,209.40 × 85,163.40
  4. Step 4: Simplify right side
    98,285.40x = 12,536,853,015.96
  5. Step 5: Solve for x
    x = 12,536,853,015.96/98,285.40
  6. Step 6: Final answer
    x = 127,555.60

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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.