Home / 139,213.08-192,111.32-78,782.60

Finding the Fourth Proportional to 139,213.08, 192,111.32 and 78,782.60

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Solution

The fourth proportional to 139,213.08, 192,111.32 and 78,782.60 is: 108,718.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,213.08 : 192,111.32 = 78,782.60 : x
  2. Step 2: Convert to fraction form
    139,213.08/192,111.32 = 78,782.60/x
  3. Step 3: Cross multiply
    139,213.08x = 192,111.32 × 78,782.60
  4. Step 4: Simplify right side
    139,213.08x = 15,135,029,279.03
  5. Step 5: Solve for x
    x = 15,135,029,279.03/139,213.08
  6. Step 6: Final answer
    x = 108,718.44

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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.