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Finding the Fourth Proportional to 69,029.20, 103,470.90 and 39,383.20

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Solution

The fourth proportional to 69,029.20, 103,470.90 and 39,383.20 is: 59,033.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,029.20 : 103,470.90 = 39,383.20 : x
  2. Step 2: Convert to fraction form
    69,029.20/103,470.90 = 39,383.20/x
  3. Step 3: Cross multiply
    69,029.20x = 103,470.90 × 39,383.20
  4. Step 4: Simplify right side
    69,029.20x = 4,075,015,148.88
  5. Step 5: Solve for x
    x = 4,075,015,148.88/69,029.20
  6. Step 6: Final answer
    x = 59,033.21

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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.