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Finding the Fourth Proportional to 111,999.36, 154,551.78 and 61,698.36

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Solution

The fourth proportional to 111,999.36, 154,551.78 and 61,698.36 is: 85,139.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,999.36 : 154,551.78 = 61,698.36 : x
  2. Step 2: Convert to fraction form
    111,999.36/154,551.78 = 61,698.36/x
  3. Step 3: Cross multiply
    111,999.36x = 154,551.78 × 61,698.36
  4. Step 4: Simplify right side
    111,999.36x = 9,535,591,361.08
  5. Step 5: Solve for x
    x = 9,535,591,361.08/111,999.36
  6. Step 6: Final answer
    x = 85,139.70

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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.