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Finding the Fourth Proportional to 111,212.60, 166,818.90 and 105,769.40

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Solution

The fourth proportional to 111,212.60, 166,818.90 and 105,769.40 is: 158,654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,212.60 : 166,818.90 = 105,769.40 : x
  2. Step 2: Convert to fraction form
    111,212.60/166,818.90 = 105,769.40/x
  3. Step 3: Cross multiply
    111,212.60x = 166,818.90 × 105,769.40
  4. Step 4: Simplify right side
    111,212.60x = 17,644,334,961.66
  5. Step 5: Solve for x
    x = 17,644,334,961.66/111,212.60
  6. Step 6: Final answer
    x = 158,654.10

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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.