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Finding the Fourth Proportional to 70,016.80, 104,830.80 and 68,072.80

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Solution

The fourth proportional to 70,016.80, 104,830.80 and 68,072.80 is: 101,920.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,016.80 : 104,830.80 = 68,072.80 : x
  2. Step 2: Convert to fraction form
    70,016.80/104,830.80 = 68,072.80/x
  3. Step 3: Cross multiply
    70,016.80x = 104,830.80 × 68,072.80
  4. Step 4: Simplify right side
    70,016.80x = 7,136,126,082.24
  5. Step 5: Solve for x
    x = 7,136,126,082.24/70,016.80
  6. Step 6: Final answer
    x = 101,920.20

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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.