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Finding the Fourth Proportional to 111,974.60, 156,971.80 and 111,974.60

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Solution

The fourth proportional to 111,974.60, 156,971.80 and 111,974.60 is: 156,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,974.60 : 156,971.80 = 111,974.60 : x
  2. Step 2: Convert to fraction form
    111,974.60/156,971.80 = 111,974.60/x
  3. Step 3: Cross multiply
    111,974.60x = 156,971.80 × 111,974.60
  4. Step 4: Simplify right side
    111,974.60x = 17,576,854,516.28
  5. Step 5: Solve for x
    x = 17,576,854,516.28/111,974.60
  6. Step 6: Final answer
    x = 156,971.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.