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Finding the Fourth Proportional to 70,979.58, 106,469.37 and 18,389.07

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Solution

The fourth proportional to 70,979.58, 106,469.37 and 18,389.07 is: 27,583.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,979.58 : 106,469.37 = 18,389.07 : x
  2. Step 2: Convert to fraction form
    70,979.58/106,469.37 = 18,389.07/x
  3. Step 3: Cross multiply
    70,979.58x = 106,469.37 × 18,389.07
  4. Step 4: Simplify right side
    70,979.58x = 1,957,872,697.79
  5. Step 5: Solve for x
    x = 1,957,872,697.79/70,979.58
  6. Step 6: Final answer
    x = 27,583.61

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Similar ratio
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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.