Home / 139,137.56-192,008.26-78,707.24

Finding the Fourth Proportional to 139,137.56, 192,008.26 and 78,707.24

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Solution

The fourth proportional to 139,137.56, 192,008.26 and 78,707.24 is: 108,615.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,137.56 : 192,008.26 = 78,707.24 : x
  2. Step 2: Convert to fraction form
    139,137.56/192,008.26 = 78,707.24/x
  3. Step 3: Cross multiply
    139,137.56x = 192,008.26 × 78,707.24
  4. Step 4: Simplify right side
    139,137.56x = 15,112,440,201.80
  5. Step 5: Solve for x
    x = 15,112,440,201.80/139,137.56
  6. Step 6: Final answer
    x = 108,615.10

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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.