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Finding the Fourth Proportional to 118,704.70, 163,806.26 and 64,979.42

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Solution

The fourth proportional to 118,704.70, 163,806.26 and 64,979.42 is: 89,668.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,704.70 : 163,806.26 = 64,979.42 : x
  2. Step 2: Convert to fraction form
    118,704.70/163,806.26 = 64,979.42/x
  3. Step 3: Cross multiply
    118,704.70x = 163,806.26 × 64,979.42
  4. Step 4: Simplify right side
    118,704.70x = 10,644,035,442.27
  5. Step 5: Solve for x
    x = 10,644,035,442.27/118,704.70
  6. Step 6: Final answer
    x = 89,668.19

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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.