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Finding the Fourth Proportional to 139,238.55, 192,152.67 and 75,576.21

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Solution

The fourth proportional to 139,238.55, 192,152.67 and 75,576.21 is: 104,297.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,238.55 : 192,152.67 = 75,576.21 : x
  2. Step 2: Convert to fraction form
    139,238.55/192,152.67 = 75,576.21/x
  3. Step 3: Cross multiply
    139,238.55x = 192,152.67 × 75,576.21
  4. Step 4: Simplify right side
    139,238.55x = 14,522,170,539.98
  5. Step 5: Solve for x
    x = 14,522,170,539.98/139,238.55
  6. Step 6: Final answer
    x = 104,297.05

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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.