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Finding the Fourth Proportional to 133,083.78, 183,658.40 and 72,656.97

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Solution

The fourth proportional to 133,083.78, 183,658.40 and 72,656.97 is: 100,268.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,083.78 : 183,658.40 = 72,656.97 : x
  2. Step 2: Convert to fraction form
    133,083.78/183,658.40 = 72,656.97/x
  3. Step 3: Cross multiply
    133,083.78x = 183,658.40 × 72,656.97
  4. Step 4: Simplify right side
    133,083.78x = 13,344,062,859.05
  5. Step 5: Solve for x
    x = 13,344,062,859.05/133,083.78
  6. Step 6: Final answer
    x = 100,268.14

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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.