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Finding the Fourth Proportional to 139,226.73, 208,806.54 and 64,274.87

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Solution

The fourth proportional to 139,226.73, 208,806.54 and 64,274.87 is: 96,396.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,226.73 : 208,806.54 = 64,274.87 : x
  2. Step 2: Convert to fraction form
    139,226.73/208,806.54 = 64,274.87/x
  3. Step 3: Cross multiply
    139,226.73x = 208,806.54 × 64,274.87
  4. Step 4: Simplify right side
    139,226.73x = 13,421,012,169.62
  5. Step 5: Solve for x
    x = 13,421,012,169.62/139,226.73
  6. Step 6: Final answer
    x = 96,396.81

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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.