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Finding the Fourth Proportional to 133,287.56, 183,936.83 and 72,858.45

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Solution

The fourth proportional to 133,287.56, 183,936.83 and 72,858.45 is: 100,544.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,287.56 : 183,936.83 = 72,858.45 : x
  2. Step 2: Convert to fraction form
    133,287.56/183,936.83 = 72,858.45/x
  3. Step 3: Cross multiply
    133,287.56x = 183,936.83 × 72,858.45
  4. Step 4: Simplify right side
    133,287.56x = 13,401,352,331.71
  5. Step 5: Solve for x
    x = 13,401,352,331.71/133,287.56
  6. Step 6: Final answer
    x = 100,544.66

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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.