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Finding the Fourth Proportional to 139,612.89, 209,416.64 and 39,773.73

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Solution

The fourth proportional to 139,612.89, 209,416.64 and 39,773.73 is: 59,659.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,612.89 : 209,416.64 = 39,773.73 : x
  2. Step 2: Convert to fraction form
    139,612.89/209,416.64 = 39,773.73/x
  3. Step 3: Cross multiply
    139,612.89x = 209,416.64 × 39,773.73
  4. Step 4: Simplify right side
    139,612.89x = 8,329,280,698.00
  5. Step 5: Solve for x
    x = 8,329,280,698.00/139,612.89
  6. Step 6: Final answer
    x = 59,659.83

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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.