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Finding the Fourth Proportional to 81,133.66, 111,956.90 and 47,141.79

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Solution

The fourth proportional to 81,133.66, 111,956.90 and 47,141.79 is: 65,051.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,133.66 : 111,956.90 = 47,141.79 : x
  2. Step 2: Convert to fraction form
    81,133.66/111,956.90 = 47,141.79/x
  3. Step 3: Cross multiply
    81,133.66x = 111,956.90 × 47,141.79
  4. Step 4: Simplify right side
    81,133.66x = 5,277,848,668.85
  5. Step 5: Solve for x
    x = 5,277,848,668.85/81,133.66
  6. Step 6: Final answer
    x = 65,051.28

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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.