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Finding the Fourth Proportional to 102,747.45, 154,121.21 and 67,238.67

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Solution

The fourth proportional to 102,747.45, 154,121.21 and 67,238.67 is: 100,858.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,747.45 : 154,121.21 = 67,238.67 : x
  2. Step 2: Convert to fraction form
    102,747.45/154,121.21 = 67,238.67/x
  3. Step 3: Cross multiply
    102,747.45x = 154,121.21 × 67,238.67
  4. Step 4: Simplify right side
    102,747.45x = 10,362,905,483.99
  5. Step 5: Solve for x
    x = 10,362,905,483.99/102,747.45
  6. Step 6: Final answer
    x = 100,858.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.