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Finding the Fourth Proportional to 69,085.31, 103,628.13 and 19,168.08

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Solution

The fourth proportional to 69,085.31, 103,628.13 and 19,168.08 is: 28,752.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,085.31 : 103,628.13 = 19,168.08 : x
  2. Step 2: Convert to fraction form
    69,085.31/103,628.13 = 19,168.08/x
  3. Step 3: Cross multiply
    69,085.31x = 103,628.13 × 19,168.08
  4. Step 4: Simplify right side
    69,085.31x = 1,986,351,825.60
  5. Step 5: Solve for x
    x = 1,986,351,825.60/69,085.31
  6. Step 6: Final answer
    x = 28,752.16

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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.