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Finding the Fourth Proportional to 128,766.40, 193,149.60 and 97,662.40

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Solution

The fourth proportional to 128,766.40, 193,149.60 and 97,662.40 is: 146,493.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,766.40 : 193,149.60 = 97,662.40 : x
  2. Step 2: Convert to fraction form
    128,766.40/193,149.60 = 97,662.40/x
  3. Step 3: Cross multiply
    128,766.40x = 193,149.60 × 97,662.40
  4. Step 4: Simplify right side
    128,766.40x = 18,863,453,495.04
  5. Step 5: Solve for x
    x = 18,863,453,495.04/128,766.40
  6. Step 6: Final answer
    x = 146,493.60

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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.