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Finding the Fourth Proportional to 111,122.99, 166,730.63 and 71,187

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Solution

The fourth proportional to 111,122.99, 166,730.63 and 71,187 is: 106,810.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,122.99 : 166,730.63 = 71,187 : x
  2. Step 2: Convert to fraction form
    111,122.99/166,730.63 = 71,187/x
  3. Step 3: Cross multiply
    111,122.99x = 166,730.63 × 71,187
  4. Step 4: Simplify right side
    111,122.99x = 11,869,053,535.78
  5. Step 5: Solve for x
    x = 11,869,053,535.78/111,122.99
  6. Step 6: Final answer
    x = 106,810.06

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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.