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Finding the Fourth Proportional to 121,912.16, 182,940.46 and 55,351.28

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Solution

The fourth proportional to 121,912.16, 182,940.46 and 55,351.28 is: 83,059.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,912.16 : 182,940.46 = 55,351.28 : x
  2. Step 2: Convert to fraction form
    121,912.16/182,940.46 = 55,351.28/x
  3. Step 3: Cross multiply
    121,912.16x = 182,940.46 × 55,351.28
  4. Step 4: Simplify right side
    121,912.16x = 10,125,988,943.76
  5. Step 5: Solve for x
    x = 10,125,988,943.76/121,912.16
  6. Step 6: Final answer
    x = 83,059.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.