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Finding the Fourth Proportional to 69,034.20, 103,478.40 and 39,388.20

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Solution

The fourth proportional to 69,034.20, 103,478.40 and 39,388.20 is: 59,040.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,034.20 : 103,478.40 = 39,388.20 : x
  2. Step 2: Convert to fraction form
    69,034.20/103,478.40 = 39,388.20/x
  3. Step 3: Cross multiply
    69,034.20x = 103,478.40 × 39,388.20
  4. Step 4: Simplify right side
    69,034.20x = 4,075,827,914.88
  5. Step 5: Solve for x
    x = 4,075,827,914.88/69,034.20
  6. Step 6: Final answer
    x = 59,040.71

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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.