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Finding the Fourth Proportional to 133,240.34, 183,869.42 and 72,809.66

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Solution

The fourth proportional to 133,240.34, 183,869.42 and 72,809.66 is: 100,476.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,240.34 : 183,869.42 = 72,809.66 : x
  2. Step 2: Convert to fraction form
    133,240.34/183,869.42 = 72,809.66/x
  3. Step 3: Cross multiply
    133,240.34x = 183,869.42 × 72,809.66
  4. Step 4: Simplify right side
    133,240.34x = 13,387,469,954.60
  5. Step 5: Solve for x
    x = 13,387,469,954.60/133,240.34
  6. Step 6: Final answer
    x = 100,476.10

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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.