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Finding the Fourth Proportional to 118,798.92, 163,942.59 and 65,085.90

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Solution

The fourth proportional to 118,798.92, 163,942.59 and 65,085.90 is: 89,818.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,798.92 : 163,942.59 = 65,085.90 : x
  2. Step 2: Convert to fraction form
    118,798.92/163,942.59 = 65,085.90/x
  3. Step 3: Cross multiply
    118,798.92x = 163,942.59 × 65,085.90
  4. Step 4: Simplify right side
    118,798.92x = 10,670,351,018.48
  5. Step 5: Solve for x
    x = 10,670,351,018.48/118,798.92
  6. Step 6: Final answer
    x = 89,818.59

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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.