Home / 139,133.08-192,003.68-78,702.44

Finding the Fourth Proportional to 139,133.08, 192,003.68 and 78,702.44

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Solution

The fourth proportional to 139,133.08, 192,003.68 and 78,702.44 is: 108,609.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,133.08 : 192,003.68 = 78,702.44 : x
  2. Step 2: Convert to fraction form
    139,133.08/192,003.68 = 78,702.44/x
  3. Step 3: Cross multiply
    139,133.08x = 192,003.68 × 78,702.44
  4. Step 4: Simplify right side
    139,133.08x = 15,111,158,104.98
  5. Step 5: Solve for x
    x = 15,111,158,104.98/139,133.08
  6. Step 6: Final answer
    x = 108,609.38

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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.