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Finding the Fourth Proportional to 111,976.79, 154,527.96 and 61,675.79

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Solution

The fourth proportional to 111,976.79, 154,527.96 and 61,675.79 is: 85,112.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,976.79 : 154,527.96 = 61,675.79 : x
  2. Step 2: Convert to fraction form
    111,976.79/154,527.96 = 61,675.79/x
  3. Step 3: Cross multiply
    111,976.79x = 154,527.96 × 61,675.79
  4. Step 4: Simplify right side
    111,976.79x = 9,530,633,237.45
  5. Step 5: Solve for x
    x = 9,530,633,237.45/111,976.79
  6. Step 6: Final answer
    x = 85,112.58

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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.