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Finding the Fourth Proportional to 69,085.81, 103,628.88 and 19,168.58

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Solution

The fourth proportional to 69,085.81, 103,628.88 and 19,168.58 is: 28,752.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,085.81 : 103,628.88 = 19,168.58 : x
  2. Step 2: Convert to fraction form
    69,085.81/103,628.88 = 19,168.58/x
  3. Step 3: Cross multiply
    69,085.81x = 103,628.88 × 19,168.58
  4. Step 4: Simplify right side
    69,085.81x = 1,986,417,862.60
  5. Step 5: Solve for x
    x = 1,986,417,862.60/69,085.81
  6. Step 6: Final answer
    x = 28,752.91

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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.