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Finding the Fourth Proportional to 118,446.76, 163,456.95 and 64,731.76

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Solution

The fourth proportional to 118,446.76, 163,456.95 and 64,731.76 is: 89,330.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,446.76 : 163,456.95 = 64,731.76 : x
  2. Step 2: Convert to fraction form
    118,446.76/163,456.95 = 64,731.76/x
  3. Step 3: Cross multiply
    118,446.76x = 163,456.95 × 64,731.76
  4. Step 4: Simplify right side
    118,446.76x = 10,580,856,057.73
  5. Step 5: Solve for x
    x = 10,580,856,057.73/118,446.76
  6. Step 6: Final answer
    x = 89,330.06

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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.