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Finding the Fourth Proportional to 119,965.79, 165,544.46 and 66,250.34

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Solution

The fourth proportional to 119,965.79, 165,544.46 and 66,250.34 is: 91,420.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,965.79 : 165,544.46 = 66,250.34 : x
  2. Step 2: Convert to fraction form
    119,965.79/165,544.46 = 66,250.34/x
  3. Step 3: Cross multiply
    119,965.79x = 165,544.46 × 66,250.34
  4. Step 4: Simplify right side
    119,965.79x = 10,967,376,470.37
  5. Step 5: Solve for x
    x = 10,967,376,470.37/119,965.79
  6. Step 6: Final answer
    x = 91,420.86

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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.