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Finding the Fourth Proportional to 139,796.26, 192,926.91 and 105,279.19

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Solution

The fourth proportional to 139,796.26, 192,926.91 and 105,279.19 is: 145,291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,796.26 : 192,926.91 = 105,279.19 : x
  2. Step 2: Convert to fraction form
    139,796.26/192,926.91 = 105,279.19/x
  3. Step 3: Cross multiply
    139,796.26x = 192,926.91 × 105,279.19
  4. Step 4: Simplify right side
    139,796.26x = 20,311,188,814.00
  5. Step 5: Solve for x
    x = 20,311,188,814.00/139,796.26
  6. Step 6: Final answer
    x = 145,291.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.