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Finding the Fourth Proportional to 69,657.85, 104,486.78 and 28,075.69

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Solution

The fourth proportional to 69,657.85, 104,486.78 and 28,075.69 is: 42,113.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,657.85 : 104,486.78 = 28,075.69 : x
  2. Step 2: Convert to fraction form
    69,657.85/104,486.78 = 28,075.69/x
  3. Step 3: Cross multiply
    69,657.85x = 104,486.78 × 28,075.69
  4. Step 4: Simplify right side
    69,657.85x = 2,933,538,042.78
  5. Step 5: Solve for x
    x = 2,933,538,042.78/69,657.85
  6. Step 6: Final answer
    x = 42,113.53

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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.