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Finding the Fourth Proportional to 111,285.40, 166,928.10 and 66,889.30

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Solution

The fourth proportional to 111,285.40, 166,928.10 and 66,889.30 is: 100,333.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,285.40 : 166,928.10 = 66,889.30 : x
  2. Step 2: Convert to fraction form
    111,285.40/166,928.10 = 66,889.30/x
  3. Step 3: Cross multiply
    111,285.40x = 166,928.10 × 66,889.30
  4. Step 4: Simplify right side
    111,285.40x = 11,165,703,759.33
  5. Step 5: Solve for x
    x = 11,165,703,759.33/111,285.40
  6. Step 6: Final answer
    x = 100,333.95

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1.5x scale

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.