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Finding the Fourth Proportional to 221,121.80, 331,601.70 and 71,401.40

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Solution

The fourth proportional to 221,121.80, 331,601.70 and 71,401.40 is: 107,075.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,121.80 : 331,601.70 = 71,401.40 : x
  2. Step 2: Convert to fraction form
    221,121.80/331,601.70 = 71,401.40/x
  3. Step 3: Cross multiply
    221,121.80x = 331,601.70 × 71,401.40
  4. Step 4: Simplify right side
    221,121.80x = 23,676,825,622.38
  5. Step 5: Solve for x
    x = 23,676,825,622.38/221,121.80
  6. Step 6: Final answer
    x = 107,075.94

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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.