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Finding the Fourth Proportional to 139,260.60, 208,890.90 and 39,419.49

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Solution

The fourth proportional to 139,260.60, 208,890.90 and 39,419.49 is: 59,129.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,260.60 : 208,890.90 = 39,419.49 : x
  2. Step 2: Convert to fraction form
    139,260.60/208,890.90 = 39,419.49/x
  3. Step 3: Cross multiply
    139,260.60x = 208,890.90 × 39,419.49
  4. Step 4: Simplify right side
    139,260.60x = 8,234,373,526.98
  5. Step 5: Solve for x
    x = 8,234,373,526.98/139,260.60
  6. Step 6: Final answer
    x = 59,129.24

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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.