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Finding the Fourth Proportional to 139,794.86, 209,668.44 and 68,699.18

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Solution

The fourth proportional to 139,794.86, 209,668.44 and 68,699.18 is: 103,037.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,794.86 : 209,668.44 = 68,699.18 : x
  2. Step 2: Convert to fraction form
    139,794.86/209,668.44 = 68,699.18/x
  3. Step 3: Cross multiply
    139,794.86x = 209,668.44 × 68,699.18
  4. Step 4: Simplify right side
    139,794.86x = 14,404,049,899.88
  5. Step 5: Solve for x
    x = 14,404,049,899.88/139,794.86
  6. Step 6: Final answer
    x = 103,037.05

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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.