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Finding the Fourth Proportional to 119,728.94, 165,222.18 and 66,015

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Solution

The fourth proportional to 119,728.94, 165,222.18 and 66,015 is: 91,098.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,728.94 : 165,222.18 = 66,015 : x
  2. Step 2: Convert to fraction form
    119,728.94/165,222.18 = 66,015/x
  3. Step 3: Cross multiply
    119,728.94x = 165,222.18 × 66,015
  4. Step 4: Simplify right side
    119,728.94x = 10,907,142,212.70
  5. Step 5: Solve for x
    x = 10,907,142,212.70/119,728.94
  6. Step 6: Final answer
    x = 91,098.63

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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.