Home / 142,163.24-196,180.11-78,499.67

Finding the Fourth Proportional to 142,163.24, 196,180.11 and 78,499.67

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Solution

The fourth proportional to 142,163.24, 196,180.11 and 78,499.67 is: 108,326.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,163.24 : 196,180.11 = 78,499.67 : x
  2. Step 2: Convert to fraction form
    142,163.24/196,180.11 = 78,499.67/x
  3. Step 3: Cross multiply
    142,163.24x = 196,180.11 × 78,499.67
  4. Step 4: Simplify right side
    142,163.24x = 15,400,072,914.66
  5. Step 5: Solve for x
    x = 15,400,072,914.66/142,163.24
  6. Step 6: Final answer
    x = 108,326.69

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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.