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Finding the Fourth Proportional to 139,408.28, 209,137.01 and 44,655.14

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Solution

The fourth proportional to 139,408.28, 209,137.01 and 44,655.14 is: 66,990.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,408.28 : 209,137.01 = 44,655.14 : x
  2. Step 2: Convert to fraction form
    139,408.28/209,137.01 = 44,655.14/x
  3. Step 3: Cross multiply
    139,408.28x = 209,137.01 × 44,655.14
  4. Step 4: Simplify right side
    139,408.28x = 9,339,041,191.77
  5. Step 5: Solve for x
    x = 9,339,041,191.77/139,408.28
  6. Step 6: Final answer
    x = 66,990.58

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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.