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Finding the Fourth Proportional to 111,618.64, 154,056.36 and 68,578.48

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Solution

The fourth proportional to 111,618.64, 154,056.36 and 68,578.48 is: 94,652.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,618.64 : 154,056.36 = 68,578.48 : x
  2. Step 2: Convert to fraction form
    111,618.64/154,056.36 = 68,578.48/x
  3. Step 3: Cross multiply
    111,618.64x = 154,056.36 × 68,578.48
  4. Step 4: Simplify right side
    111,618.64x = 10,564,951,003.13
  5. Step 5: Solve for x
    x = 10,564,951,003.13/111,618.64
  6. Step 6: Final answer
    x = 94,652.21

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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.