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Finding the Fourth Proportional to 118,708.50, 163,817.88 and 64,993.88

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Solution

The fourth proportional to 118,708.50, 163,817.88 and 64,993.88 is: 89,691.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,708.50 : 163,817.88 = 64,993.88 : x
  2. Step 2: Convert to fraction form
    118,708.50/163,817.88 = 64,993.88/x
  3. Step 3: Cross multiply
    118,708.50x = 163,817.88 × 64,993.88
  4. Step 4: Simplify right side
    118,708.50x = 10,647,159,634.57
  5. Step 5: Solve for x
    x = 10,647,159,634.57/118,708.50
  6. Step 6: Final answer
    x = 89,691.64

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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.