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Finding the Fourth Proportional to 69,367.98, 104,075.32 and 21,990.80

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Solution

The fourth proportional to 69,367.98, 104,075.32 and 21,990.80 is: 32,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,367.98 : 104,075.32 = 21,990.80 : x
  2. Step 2: Convert to fraction form
    69,367.98/104,075.32 = 21,990.80/x
  3. Step 3: Cross multiply
    69,367.98x = 104,075.32 × 21,990.80
  4. Step 4: Simplify right side
    69,367.98x = 2,288,699,547.06
  5. Step 5: Solve for x
    x = 2,288,699,547.06/69,367.98
  6. Step 6: Final answer
    x = 32,993.60

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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.