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Finding the Fourth Proportional to 111,561.60, 166,996.80 and 64,675.20

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Solution

The fourth proportional to 111,561.60, 166,996.80 and 64,675.20 is: 96,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,561.60 : 166,996.80 = 64,675.20 : x
  2. Step 2: Convert to fraction form
    111,561.60/166,996.80 = 64,675.20/x
  3. Step 3: Cross multiply
    111,561.60x = 166,996.80 × 64,675.20
  4. Step 4: Simplify right side
    111,561.60x = 10,800,551,439.36
  5. Step 5: Solve for x
    x = 10,800,551,439.36/111,561.60
  6. Step 6: Final answer
    x = 96,812.45

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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.