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Finding the Fourth Proportional to 118,612.76, 163,690.50 and 64,902.48

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Solution

The fourth proportional to 118,612.76, 163,690.50 and 64,902.48 is: 89,568.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,612.76 : 163,690.50 = 64,902.48 : x
  2. Step 2: Convert to fraction form
    118,612.76/163,690.50 = 64,902.48/x
  3. Step 3: Cross multiply
    118,612.76x = 163,690.50 × 64,902.48
  4. Step 4: Simplify right side
    118,612.76x = 10,623,919,402.44
  5. Step 5: Solve for x
    x = 10,623,919,402.44/118,612.76
  6. Step 6: Final answer
    x = 89,568.10

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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.