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Finding the Fourth Proportional to 72,697.78, 108,843.36 and 39,298

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Solution

The fourth proportional to 72,697.78, 108,843.36 and 39,298 is: 58,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,697.78 : 108,843.36 = 39,298 : x
  2. Step 2: Convert to fraction form
    72,697.78/108,843.36 = 39,298/x
  3. Step 3: Cross multiply
    72,697.78x = 108,843.36 × 39,298
  4. Step 4: Simplify right side
    72,697.78x = 4,277,326,361.28
  5. Step 5: Solve for x
    x = 4,277,326,361.28/72,697.78
  6. Step 6: Final answer
    x = 58,837.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.