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Finding the Fourth Proportional to 117,963.28, 162,790.38 and 64,248.54

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Solution

The fourth proportional to 117,963.28, 162,790.38 and 64,248.54 is: 88,663.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,963.28 : 162,790.38 = 64,248.54 : x
  2. Step 2: Convert to fraction form
    117,963.28/162,790.38 = 64,248.54/x
  3. Step 3: Cross multiply
    117,963.28x = 162,790.38 × 64,248.54
  4. Step 4: Simplify right side
    117,963.28x = 10,459,044,241.05
  5. Step 5: Solve for x
    x = 10,459,044,241.05/117,963.28
  6. Step 6: Final answer
    x = 88,663.56

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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.