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Finding the Fourth Proportional to 139,626.69, 192,683.96 and 75,964.77

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Solution

The fourth proportional to 139,626.69, 192,683.96 and 75,964.77 is: 104,830.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,626.69 : 192,683.96 = 75,964.77 : x
  2. Step 2: Convert to fraction form
    139,626.69/192,683.96 = 75,964.77/x
  3. Step 3: Cross multiply
    139,626.69x = 192,683.96 × 75,964.77
  4. Step 4: Simplify right side
    139,626.69x = 14,637,192,324.27
  5. Step 5: Solve for x
    x = 14,637,192,324.27/139,626.69
  6. Step 6: Final answer
    x = 104,830.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.