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Finding the Fourth Proportional to 139,229.70, 208,811.09 and 64,277.85

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Solution

The fourth proportional to 139,229.70, 208,811.09 and 64,277.85 is: 96,401.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,229.70 : 208,811.09 = 64,277.85 : x
  2. Step 2: Convert to fraction form
    139,229.70/208,811.09 = 64,277.85/x
  3. Step 3: Cross multiply
    139,229.70x = 208,811.09 × 64,277.85
  4. Step 4: Simplify right side
    139,229.70x = 13,421,928,503.53
  5. Step 5: Solve for x
    x = 13,421,928,503.53/139,229.70
  6. Step 6: Final answer
    x = 96,401.33

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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.