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Finding the Fourth Proportional to 111,999.19, 154,558.81 and 61,698.19

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Solution

The fourth proportional to 111,999.19, 154,558.81 and 61,698.19 is: 85,143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,999.19 : 154,558.81 = 61,698.19 : x
  2. Step 2: Convert to fraction form
    111,999.19/154,558.81 = 61,698.19/x
  3. Step 3: Cross multiply
    111,999.19x = 154,558.81 × 61,698.19
  4. Step 4: Simplify right side
    111,999.19x = 9,535,998,825.55
  5. Step 5: Solve for x
    x = 9,535,998,825.55/111,999.19
  6. Step 6: Final answer
    x = 85,143.46

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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.