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Finding the Fourth Proportional to 138,436.70, 193,942.60 and 138,436.70

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Solution

The fourth proportional to 138,436.70, 193,942.60 and 138,436.70 is: 193,942.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,436.70 : 193,942.60 = 138,436.70 : x
  2. Step 2: Convert to fraction form
    138,436.70/193,942.60 = 138,436.70/x
  3. Step 3: Cross multiply
    138,436.70x = 193,942.60 × 138,436.70
  4. Step 4: Simplify right side
    138,436.70x = 26,848,773,533.42
  5. Step 5: Solve for x
    x = 26,848,773,533.42/138,436.70
  6. Step 6: Final answer
    x = 193,942.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.