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Finding the Fourth Proportional to 70,694.32, 106,040.92 and 18,103.72

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Solution

The fourth proportional to 70,694.32, 106,040.92 and 18,103.72 is: 27,155.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,694.32 : 106,040.92 = 18,103.72 : x
  2. Step 2: Convert to fraction form
    70,694.32/106,040.92 = 18,103.72/x
  3. Step 3: Cross multiply
    70,694.32x = 106,040.92 × 18,103.72
  4. Step 4: Simplify right side
    70,694.32x = 1,919,735,124.22
  5. Step 5: Solve for x
    x = 1,919,735,124.22/70,694.32
  6. Step 6: Final answer
    x = 27,155.44

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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.