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Finding the Fourth Proportional to 118,684.87, 163,785.11 and 64,969.92

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Solution

The fourth proportional to 118,684.87, 163,785.11 and 64,969.92 is: 89,658.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,684.87 : 163,785.11 = 64,969.92 : x
  2. Step 2: Convert to fraction form
    118,684.87/163,785.11 = 64,969.92/x
  3. Step 3: Cross multiply
    118,684.87x = 163,785.11 × 64,969.92
  4. Step 4: Simplify right side
    118,684.87x = 10,641,105,169.04
  5. Step 5: Solve for x
    x = 10,641,105,169.04/118,684.87
  6. Step 6: Final answer
    x = 89,658.48

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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.