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Finding the Fourth Proportional to 111,620.64, 154,059.12 and 68,580.48

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Solution

The fourth proportional to 111,620.64, 154,059.12 and 68,580.48 is: 94,654.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,620.64 : 154,059.12 = 68,580.48 : x
  2. Step 2: Convert to fraction form
    111,620.64/154,059.12 = 68,580.48/x
  3. Step 3: Cross multiply
    111,620.64x = 154,059.12 × 68,580.48
  4. Step 4: Simplify right side
    111,620.64x = 10,565,448,397.98
  5. Step 5: Solve for x
    x = 10,565,448,397.98/111,620.64
  6. Step 6: Final answer
    x = 94,654.97

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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.