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Finding the Fourth Proportional to 118,190.92, 163,103.40 and 64,475.81

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Solution

The fourth proportional to 118,190.92, 163,103.40 and 64,475.81 is: 88,976.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,190.92 : 163,103.40 = 64,475.81 : x
  2. Step 2: Convert to fraction form
    118,190.92/163,103.40 = 64,475.81/x
  3. Step 3: Cross multiply
    118,190.92x = 163,103.40 × 64,475.81
  4. Step 4: Simplify right side
    118,190.92x = 10,516,223,828.75
  5. Step 5: Solve for x
    x = 10,516,223,828.75/118,190.92
  6. Step 6: Final answer
    x = 88,976.58

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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.