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Finding the Fourth Proportional to 133,066.75, 183,636.56 and 72,640.97

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Solution

The fourth proportional to 133,066.75, 183,636.56 and 72,640.97 is: 100,246.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,066.75 : 183,636.56 = 72,640.97 : x
  2. Step 2: Convert to fraction form
    133,066.75/183,636.56 = 72,640.97/x
  3. Step 3: Cross multiply
    133,066.75x = 183,636.56 × 72,640.97
  4. Step 4: Simplify right side
    133,066.75x = 13,339,537,845.86
  5. Step 5: Solve for x
    x = 13,339,537,845.86/133,066.75
  6. Step 6: Final answer
    x = 100,246.97

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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.