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Finding the Fourth Proportional to 111,813.64, 154,310.34 and 61,515.88

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Solution

The fourth proportional to 111,813.64, 154,310.34 and 61,515.88 is: 84,896.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,813.64 : 154,310.34 = 61,515.88 : x
  2. Step 2: Convert to fraction form
    111,813.64/154,310.34 = 61,515.88/x
  3. Step 3: Cross multiply
    111,813.64x = 154,310.34 × 61,515.88
  4. Step 4: Simplify right side
    111,813.64x = 9,492,536,358.20
  5. Step 5: Solve for x
    x = 9,492,536,358.20/111,813.64
  6. Step 6: Final answer
    x = 84,896.05

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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.