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Finding the Fourth Proportional to 111,976.66, 154,527.79 and 61,675.66

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Solution

The fourth proportional to 111,976.66, 154,527.79 and 61,675.66 is: 85,112.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,976.66 : 154,527.79 = 61,675.66 : x
  2. Step 2: Convert to fraction form
    111,976.66/154,527.79 = 61,675.66/x
  3. Step 3: Cross multiply
    111,976.66x = 154,527.79 × 61,675.66
  4. Step 4: Simplify right side
    111,976.66x = 9,530,603,128.21
  5. Step 5: Solve for x
    x = 9,530,603,128.21/111,976.66
  6. Step 6: Final answer
    x = 85,112.41

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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.