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Finding the Fourth Proportional to 137,431.40, 206,147.10 and 106,327.40

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Solution

The fourth proportional to 137,431.40, 206,147.10 and 106,327.40 is: 159,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,431.40 : 206,147.10 = 106,327.40 : x
  2. Step 2: Convert to fraction form
    137,431.40/206,147.10 = 106,327.40/x
  3. Step 3: Cross multiply
    137,431.40x = 206,147.10 × 106,327.40
  4. Step 4: Simplify right side
    137,431.40x = 21,919,085,160.54
  5. Step 5: Solve for x
    x = 21,919,085,160.54/137,431.40
  6. Step 6: Final answer
    x = 159,491.10

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1.5x scale

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.