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Finding the Fourth Proportional to 133,066.80, 183,634.29 and 72,637.97

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Solution

The fourth proportional to 133,066.80, 183,634.29 and 72,637.97 is: 100,241.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,066.80 : 183,634.29 = 72,637.97 : x
  2. Step 2: Convert to fraction form
    133,066.80/183,634.29 = 72,637.97/x
  3. Step 3: Cross multiply
    133,066.80x = 183,634.29 × 72,637.97
  4. Step 4: Simplify right side
    133,066.80x = 13,338,821,129.82
  5. Step 5: Solve for x
    x = 13,338,821,129.82/133,066.80
  6. Step 6: Final answer
    x = 100,241.54

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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.