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Finding the Fourth Proportional to 111,838.59, 154,286.40 and 66,490.84

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Solution

The fourth proportional to 111,838.59, 154,286.40 and 66,490.84 is: 91,727.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,838.59 : 154,286.40 = 66,490.84 : x
  2. Step 2: Convert to fraction form
    111,838.59/154,286.40 = 66,490.84/x
  3. Step 3: Cross multiply
    111,838.59x = 154,286.40 × 66,490.84
  4. Step 4: Simplify right side
    111,838.59x = 10,258,632,336.58
  5. Step 5: Solve for x
    x = 10,258,632,336.58/111,838.59
  6. Step 6: Final answer
    x = 91,727.13

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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.