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Finding the Fourth Proportional to 138,912.20, 194,243.80 and 138,912.20

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Solution

The fourth proportional to 138,912.20, 194,243.80 and 138,912.20 is: 194,243.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,912.20 : 194,243.80 = 138,912.20 : x
  2. Step 2: Convert to fraction form
    138,912.20/194,243.80 = 138,912.20/x
  3. Step 3: Cross multiply
    138,912.20x = 194,243.80 × 138,912.20
  4. Step 4: Simplify right side
    138,912.20x = 26,982,833,594.36
  5. Step 5: Solve for x
    x = 26,982,833,594.36/138,912.20
  6. Step 6: Final answer
    x = 194,243.80

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1.5x scale

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.