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Finding the Fourth Proportional to 118,078.56, 162,948.48 and 64,363.68

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Solution

The fourth proportional to 118,078.56, 162,948.48 and 64,363.68 is: 88,821.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,078.56 : 162,948.48 = 64,363.68 : x
  2. Step 2: Convert to fraction form
    118,078.56/162,948.48 = 64,363.68/x
  3. Step 3: Cross multiply
    118,078.56x = 162,948.48 × 64,363.68
  4. Step 4: Simplify right side
    118,078.56x = 10,487,963,823.21
  5. Step 5: Solve for x
    x = 10,487,963,823.21/118,078.56
  6. Step 6: Final answer
    x = 88,821.92

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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.