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Finding the Fourth Proportional to 69,355.62, 103,989.69 and 38,212.74

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Solution

The fourth proportional to 69,355.62, 103,989.69 and 38,212.74 is: 57,295.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,355.62 : 103,989.69 = 38,212.74 : x
  2. Step 2: Convert to fraction form
    69,355.62/103,989.69 = 38,212.74/x
  3. Step 3: Cross multiply
    69,355.62x = 103,989.69 × 38,212.74
  4. Step 4: Simplify right side
    69,355.62x = 3,973,730,986.65
  5. Step 5: Solve for x
    x = 3,973,730,986.65/69,355.62
  6. Step 6: Final answer
    x = 57,295.01

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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.