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Finding the Fourth Proportional to 111,991.92, 154,548.84 and 61,690.92

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Solution

The fourth proportional to 111,991.92, 154,548.84 and 61,690.92 is: 85,133.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,991.92 : 154,548.84 = 61,690.92 : x
  2. Step 2: Convert to fraction form
    111,991.92/154,548.84 = 61,690.92/x
  3. Step 3: Cross multiply
    111,991.92x = 154,548.84 × 61,690.92
  4. Step 4: Simplify right side
    111,991.92x = 9,534,260,124.53
  5. Step 5: Solve for x
    x = 9,534,260,124.53/111,991.92
  6. Step 6: Final answer
    x = 85,133.46

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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.