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Finding the Fourth Proportional to 209,300.20, 313,950.30 and 69,040.60

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Solution

The fourth proportional to 209,300.20, 313,950.30 and 69,040.60 is: 103,560.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,300.20 : 313,950.30 = 69,040.60 : x
  2. Step 2: Convert to fraction form
    209,300.20/313,950.30 = 69,040.60/x
  3. Step 3: Cross multiply
    209,300.20x = 313,950.30 × 69,040.60
  4. Step 4: Simplify right side
    209,300.20x = 21,675,317,082.18
  5. Step 5: Solve for x
    x = 21,675,317,082.18/209,300.20
  6. Step 6: Final answer
    x = 103,560.90

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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.