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Finding the Fourth Proportional to 139,607.27, 209,408.20 and 39,768.11

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Solution

The fourth proportional to 139,607.27, 209,408.20 and 39,768.11 is: 59,651.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,607.27 : 209,408.20 = 39,768.11 : x
  2. Step 2: Convert to fraction form
    139,607.27/209,408.20 = 39,768.11/x
  3. Step 3: Cross multiply
    139,607.27x = 209,408.20 × 39,768.11
  4. Step 4: Simplify right side
    139,607.27x = 8,327,767,186.04
  5. Step 5: Solve for x
    x = 8,327,767,186.04/139,607.27
  6. Step 6: Final answer
    x = 59,651.39

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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.