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Finding the Fourth Proportional to 111,995.80, 154,554.21 and 61,694.80

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Solution

The fourth proportional to 111,995.80, 154,554.21 and 61,694.80 is: 85,138.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,995.80 : 154,554.21 = 61,694.80 : x
  2. Step 2: Convert to fraction form
    111,995.80/154,554.21 = 61,694.80/x
  3. Step 3: Cross multiply
    111,995.80x = 154,554.21 × 61,694.80
  4. Step 4: Simplify right side
    111,995.80x = 9,535,190,688.72
  5. Step 5: Solve for x
    x = 9,535,190,688.72/111,995.80
  6. Step 6: Final answer
    x = 85,138.83

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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.