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Finding the Fourth Proportional to 117,141.38, 161,648.71 and 68,736.79

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Solution

The fourth proportional to 117,141.38, 161,648.71 and 68,736.79 is: 94,853.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,141.38 : 161,648.71 = 68,736.79 : x
  2. Step 2: Convert to fraction form
    117,141.38/161,648.71 = 68,736.79/x
  3. Step 3: Cross multiply
    117,141.38x = 161,648.71 × 68,736.79
  4. Step 4: Simplify right side
    117,141.38x = 11,111,212,281.11
  5. Step 5: Solve for x
    x = 11,111,212,281.11/117,141.38
  6. Step 6: Final answer
    x = 94,853.01

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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.