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Finding the Fourth Proportional to 111,992.64, 154,505.52 and 77,992.08

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Solution

The fourth proportional to 111,992.64, 154,505.52 and 77,992.08 is: 107,598.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,992.64 : 154,505.52 = 77,992.08 : x
  2. Step 2: Convert to fraction form
    111,992.64/154,505.52 = 77,992.08/x
  3. Step 3: Cross multiply
    111,992.64x = 154,505.52 × 77,992.08
  4. Step 4: Simplify right side
    111,992.64x = 12,050,206,876.28
  5. Step 5: Solve for x
    x = 12,050,206,876.28/111,992.64
  6. Step 6: Final answer
    x = 107,598.20

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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.