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Finding the Fourth Proportional to 133,238.59, 183,871.66 and 72,811.78

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Solution

The fourth proportional to 133,238.59, 183,871.66 and 72,811.78 is: 100,481.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,238.59 : 183,871.66 = 72,811.78 : x
  2. Step 2: Convert to fraction form
    133,238.59/183,871.66 = 72,811.78/x
  3. Step 3: Cross multiply
    133,238.59x = 183,871.66 × 72,811.78
  4. Step 4: Simplify right side
    133,238.59x = 13,388,022,214.45
  5. Step 5: Solve for x
    x = 13,388,022,214.45/133,238.59
  6. Step 6: Final answer
    x = 100,481.57

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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.