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Finding the Fourth Proportional to 139,231.26, 208,813.44 and 64,279.42

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Solution

The fourth proportional to 139,231.26, 208,813.44 and 64,279.42 is: 96,403.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,231.26 : 208,813.44 = 64,279.42 : x
  2. Step 2: Convert to fraction form
    139,231.26/208,813.44 = 64,279.42/x
  3. Step 3: Cross multiply
    139,231.26x = 208,813.44 × 64,279.42
  4. Step 4: Simplify right side
    139,231.26x = 13,422,406,811.40
  5. Step 5: Solve for x
    x = 13,422,406,811.40/139,231.26
  6. Step 6: Final answer
    x = 96,403.69

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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.