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Finding the Fourth Proportional to 69,114.87, 103,661.87 and 19,189.71

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Solution

The fourth proportional to 69,114.87, 103,661.87 and 19,189.71 is: 28,781.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,114.87 : 103,661.87 = 19,189.71 : x
  2. Step 2: Convert to fraction form
    69,114.87/103,661.87 = 19,189.71/x
  3. Step 3: Cross multiply
    69,114.87x = 103,661.87 × 19,189.71
  4. Step 4: Simplify right side
    69,114.87x = 1,989,241,127.41
  5. Step 5: Solve for x
    x = 1,989,241,127.41/69,114.87
  6. Step 6: Final answer
    x = 28,781.67

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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.