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Finding the Fourth Proportional to 111,740.20, 154,201.45 and 61,439.20

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Solution

The fourth proportional to 111,740.20, 154,201.45 and 61,439.20 is: 84,786.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,740.20 : 154,201.45 = 61,439.20 : x
  2. Step 2: Convert to fraction form
    111,740.20/154,201.45 = 61,439.20/x
  3. Step 3: Cross multiply
    111,740.20x = 154,201.45 × 61,439.20
  4. Step 4: Simplify right side
    111,740.20x = 9,474,013,726.84
  5. Step 5: Solve for x
    x = 9,474,013,726.84/111,740.20
  6. Step 6: Final answer
    x = 84,786.08

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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.