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Finding the Fourth Proportional to 111,713.68, 154,147.64 and 66,374.88

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Solution

The fourth proportional to 111,713.68, 154,147.64 and 66,374.88 is: 91,587.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,713.68 : 154,147.64 = 66,374.88 : x
  2. Step 2: Convert to fraction form
    111,713.68/154,147.64 = 66,374.88/x
  3. Step 3: Cross multiply
    111,713.68x = 154,147.64 × 66,374.88
  4. Step 4: Simplify right side
    111,713.68x = 10,231,531,107.28
  5. Step 5: Solve for x
    x = 10,231,531,107.28/111,713.68
  6. Step 6: Final answer
    x = 91,587.09

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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.