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Finding the Fourth Proportional to 111,906.78, 154,430.55 and 61,604.70

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Solution

The fourth proportional to 111,906.78, 154,430.55 and 61,604.70 is: 85,014.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,906.78 : 154,430.55 = 61,604.70 : x
  2. Step 2: Convert to fraction form
    111,906.78/154,430.55 = 61,604.70/x
  3. Step 3: Cross multiply
    111,906.78x = 154,430.55 × 61,604.70
  4. Step 4: Simplify right side
    111,906.78x = 9,513,647,703.59
  5. Step 5: Solve for x
    x = 9,513,647,703.59/111,906.78
  6. Step 6: Final answer
    x = 85,014.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.