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Finding the Fourth Proportional to 118,564.84, 163,669.86 and 73,874.92

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Solution

The fourth proportional to 118,564.84, 163,669.86 and 73,874.92 is: 101,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,564.84 : 163,669.86 = 73,874.92 : x
  2. Step 2: Convert to fraction form
    118,564.84/163,669.86 = 73,874.92/x
  3. Step 3: Cross multiply
    118,564.84x = 163,669.86 × 73,874.92
  4. Step 4: Simplify right side
    118,564.84x = 12,091,097,813.91
  5. Step 5: Solve for x
    x = 12,091,097,813.91/118,564.84
  6. Step 6: Final answer
    x = 101,978.78

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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.