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Finding the Fourth Proportional to 111,106, 166,659 and 28,000

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Solution

The fourth proportional to 111,106, 166,659 and 28,000 is: 42,000

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,106 : 166,659 = 28,000 : x
  2. Step 2: Convert to fraction form
    111,106/166,659 = 28,000/x
  3. Step 3: Cross multiply
    111,106x = 166,659 × 28,000
  4. Step 4: Simplify right side
    111,106x = 4,666,452,000
  5. Step 5: Solve for x
    x = 4,666,452,000/111,106
  6. Step 6: Final answer
    x = 42,000

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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.