Home / 139,339.14-192,292.55-78,908.48

Finding the Fourth Proportional to 139,339.14, 192,292.55 and 78,908.48

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Solution

The fourth proportional to 139,339.14, 192,292.55 and 78,908.48 is: 108,896.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,339.14 : 192,292.55 = 78,908.48 : x
  2. Step 2: Convert to fraction form
    139,339.14/192,292.55 = 78,908.48/x
  3. Step 3: Cross multiply
    139,339.14x = 192,292.55 × 78,908.48
  4. Step 4: Simplify right side
    139,339.14x = 15,173,512,496.82
  5. Step 5: Solve for x
    x = 15,173,512,496.82/139,339.14
  6. Step 6: Final answer
    x = 108,896.27

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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.