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Finding the Fourth Proportional to 111,647.80, 167,471.70 and 81,904.60

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Solution

The fourth proportional to 111,647.80, 167,471.70 and 81,904.60 is: 122,856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,647.80 : 167,471.70 = 81,904.60 : x
  2. Step 2: Convert to fraction form
    111,647.80/167,471.70 = 81,904.60/x
  3. Step 3: Cross multiply
    111,647.80x = 167,471.70 × 81,904.60
  4. Step 4: Simplify right side
    111,647.80x = 13,716,702,599.82
  5. Step 5: Solve for x
    x = 13,716,702,599.82/111,647.80
  6. Step 6: Final answer
    x = 122,856.90

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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.