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Finding the Fourth Proportional to 239,999.72, 331,156.32 and 155,067.58

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Solution

The fourth proportional to 239,999.72, 331,156.32 and 155,067.58 is: 213,965.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,999.72 : 331,156.32 = 155,067.58 : x
  2. Step 2: Convert to fraction form
    239,999.72/331,156.32 = 155,067.58/x
  3. Step 3: Cross multiply
    239,999.72x = 331,156.32 × 155,067.58
  4. Step 4: Simplify right side
    239,999.72x = 51,351,609,144.11
  5. Step 5: Solve for x
    x = 51,351,609,144.11/239,999.72
  6. Step 6: Final answer
    x = 213,965.29

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1.5x scale

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.