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Finding the Fourth Proportional to 139,239.60, 192,150 and 75,576.84

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Solution

The fourth proportional to 139,239.60, 192,150 and 75,576.84 is: 104,295.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,239.60 : 192,150 = 75,576.84 : x
  2. Step 2: Convert to fraction form
    139,239.60/192,150 = 75,576.84/x
  3. Step 3: Cross multiply
    139,239.60x = 192,150 × 75,576.84
  4. Step 4: Simplify right side
    139,239.60x = 14,522,089,806
  5. Step 5: Solve for x
    x = 14,522,089,806/139,239.60
  6. Step 6: Final answer
    x = 104,295.69

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1.5x scale

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.