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Finding the Fourth Proportional to 279,136.62, 385,121.62 and 158,268.42

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Solution

The fourth proportional to 279,136.62, 385,121.62 and 158,268.42 is: 218,361.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,136.62 : 385,121.62 = 158,268.42 : x
  2. Step 2: Convert to fraction form
    279,136.62/385,121.62 = 158,268.42/x
  3. Step 3: Cross multiply
    279,136.62x = 385,121.62 × 158,268.42
  4. Step 4: Simplify right side
    279,136.62x = 60,952,590,305.24
  5. Step 5: Solve for x
    x = 60,952,590,305.24/279,136.62
  6. Step 6: Final answer
    x = 218,361.14

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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.