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Finding the Fourth Proportional to 111,127.20, 166,690.80 and 61,360.80

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Solution

The fourth proportional to 111,127.20, 166,690.80 and 61,360.80 is: 92,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,127.20 : 166,690.80 = 61,360.80 : x
  2. Step 2: Convert to fraction form
    111,127.20/166,690.80 = 61,360.80/x
  3. Step 3: Cross multiply
    111,127.20x = 166,690.80 × 61,360.80
  4. Step 4: Simplify right side
    111,127.20x = 10,228,280,840.64
  5. Step 5: Solve for x
    x = 10,228,280,840.64/111,127.20
  6. Step 6: Final answer
    x = 92,041.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.