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Finding the Fourth Proportional to 139,239.68, 192,150.08 and 75,573.76

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Solution

The fourth proportional to 139,239.68, 192,150.08 and 75,573.76 is: 104,291.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,239.68 : 192,150.08 = 75,573.76 : x
  2. Step 2: Convert to fraction form
    139,239.68/192,150.08 = 75,573.76/x
  3. Step 3: Cross multiply
    139,239.68x = 192,150.08 × 75,573.76
  4. Step 4: Simplify right side
    139,239.68x = 14,521,504,029.90
  5. Step 5: Solve for x
    x = 14,521,504,029.90/139,239.68
  6. Step 6: Final answer
    x = 104,291.42

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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.