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Finding the Fourth Proportional to 70,379.80, 105,588.06 and 30,944.68

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Solution

The fourth proportional to 70,379.80, 105,588.06 and 30,944.68 is: 46,425.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,379.80 : 105,588.06 = 30,944.68 : x
  2. Step 2: Convert to fraction form
    70,379.80/105,588.06 = 30,944.68/x
  3. Step 3: Cross multiply
    70,379.80x = 105,588.06 × 30,944.68
  4. Step 4: Simplify right side
    70,379.80x = 3,267,388,728.52
  5. Step 5: Solve for x
    x = 3,267,388,728.52/70,379.80
  6. Step 6: Final answer
    x = 46,425.09

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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.