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Finding the Fourth Proportional to 69,839.20, 104,758.80 and 68,802.40

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Solution

The fourth proportional to 69,839.20, 104,758.80 and 68,802.40 is: 103,203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,839.20 : 104,758.80 = 68,802.40 : x
  2. Step 2: Convert to fraction form
    69,839.20/104,758.80 = 68,802.40/x
  3. Step 3: Cross multiply
    69,839.20x = 104,758.80 × 68,802.40
  4. Step 4: Simplify right side
    69,839.20x = 7,207,656,861.12
  5. Step 5: Solve for x
    x = 7,207,656,861.12/69,839.20
  6. Step 6: Final answer
    x = 103,203.60

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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.