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Finding the Fourth Proportional to 121,113.50, 167,136.63 and 68,121.50

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Solution

The fourth proportional to 121,113.50, 167,136.63 and 68,121.50 is: 94,007.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,113.50 : 167,136.63 = 68,121.50 : x
  2. Step 2: Convert to fraction form
    121,113.50/167,136.63 = 68,121.50/x
  3. Step 3: Cross multiply
    121,113.50x = 167,136.63 × 68,121.50
  4. Step 4: Simplify right side
    121,113.50x = 11,385,597,940.55
  5. Step 5: Solve for x
    x = 11,385,597,940.55/121,113.50
  6. Step 6: Final answer
    x = 94,007.67

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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.