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Finding the Fourth Proportional to 111,157.61, 166,588.77 and 71,102.70

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Solution

The fourth proportional to 111,157.61, 166,588.77 and 71,102.70 is: 106,559.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,157.61 : 166,588.77 = 71,102.70 : x
  2. Step 2: Convert to fraction form
    111,157.61/166,588.77 = 71,102.70/x
  3. Step 3: Cross multiply
    111,157.61x = 166,588.77 × 71,102.70
  4. Step 4: Simplify right side
    111,157.61x = 11,844,911,336.68
  5. Step 5: Solve for x
    x = 11,844,911,336.68/111,157.61
  6. Step 6: Final answer
    x = 106,559.61

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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.