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Finding the Fourth Proportional to 138,959.83, 191,690.61 and 84,528.64

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Solution

The fourth proportional to 138,959.83, 191,690.61 and 84,528.64 is: 116,604.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,959.83 : 191,690.61 = 84,528.64 : x
  2. Step 2: Convert to fraction form
    138,959.83/191,690.61 = 84,528.64/x
  3. Step 3: Cross multiply
    138,959.83x = 191,690.61 × 84,528.64
  4. Step 4: Simplify right side
    138,959.83x = 16,203,345,182.97
  5. Step 5: Solve for x
    x = 16,203,345,182.97/138,959.83
  6. Step 6: Final answer
    x = 116,604.53

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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.