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Finding the Fourth Proportional to 111,913.60, 168,064.80 and 108,414.40

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Solution

The fourth proportional to 111,913.60, 168,064.80 and 108,414.40 is: 162,809.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,913.60 : 168,064.80 = 108,414.40 : x
  2. Step 2: Convert to fraction form
    111,913.60/168,064.80 = 108,414.40/x
  3. Step 3: Cross multiply
    111,913.60x = 168,064.80 × 108,414.40
  4. Step 4: Simplify right side
    111,913.60x = 18,220,644,453.12
  5. Step 5: Solve for x
    x = 18,220,644,453.12/111,913.60
  6. Step 6: Final answer
    x = 162,809.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.