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Finding the Fourth Proportional to 111,961.96, 154,500.39 and 61,660.96

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Solution

The fourth proportional to 111,961.96, 154,500.39 and 61,660.96 is: 85,088.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,961.96 : 154,500.39 = 61,660.96 : x
  2. Step 2: Convert to fraction form
    111,961.96/154,500.39 = 61,660.96/x
  3. Step 3: Cross multiply
    111,961.96x = 154,500.39 × 61,660.96
  4. Step 4: Simplify right side
    111,961.96x = 9,526,642,367.77
  5. Step 5: Solve for x
    x = 9,526,642,367.77/111,961.96
  6. Step 6: Final answer
    x = 85,088.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.