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Finding the Fourth Proportional to 139,730.29, 209,627.97 and 39,891.85

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Solution

The fourth proportional to 139,730.29, 209,627.97 and 39,891.85 is: 59,847.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,730.29 : 209,627.97 = 39,891.85 : x
  2. Step 2: Convert to fraction form
    139,730.29/209,627.97 = 39,891.85/x
  3. Step 3: Cross multiply
    139,730.29x = 209,627.97 × 39,891.85
  4. Step 4: Simplify right side
    139,730.29x = 8,362,446,861.38
  5. Step 5: Solve for x
    x = 8,362,446,861.38/139,730.29
  6. Step 6: Final answer
    x = 59,847.06

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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.