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Finding the Fourth Proportional to 218,012.85, 300,855.87 and 122,519.34

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Solution

The fourth proportional to 218,012.85, 300,855.87 and 122,519.34 is: 169,075.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,012.85 : 300,855.87 = 122,519.34 : x
  2. Step 2: Convert to fraction form
    218,012.85/300,855.87 = 122,519.34/x
  3. Step 3: Cross multiply
    218,012.85x = 300,855.87 × 122,519.34
  4. Step 4: Simplify right side
    218,012.85x = 36,860,662,627.53
  5. Step 5: Solve for x
    x = 36,860,662,627.53/218,012.85
  6. Step 6: Final answer
    x = 169,075.64

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1.5x scale

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.