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Finding the Fourth Proportional to 133,046.97, 183,608.80 and 72,621.57

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Solution

The fourth proportional to 133,046.97, 183,608.80 and 72,621.57 is: 100,219.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,046.97 : 183,608.80 = 72,621.57 : x
  2. Step 2: Convert to fraction form
    133,046.97/183,608.80 = 72,621.57/x
  3. Step 3: Cross multiply
    133,046.97x = 183,608.80 × 72,621.57
  4. Step 4: Simplify right side
    133,046.97x = 13,333,959,321.82
  5. Step 5: Solve for x
    x = 13,333,959,321.82/133,046.97
  6. Step 6: Final answer
    x = 100,219.94

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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.