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Finding the Fourth Proportional to 69,047.21, 103,573.11 and 19,127.81

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Solution

The fourth proportional to 69,047.21, 103,573.11 and 19,127.81 is: 28,692.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,047.21 : 103,573.11 = 19,127.81 : x
  2. Step 2: Convert to fraction form
    69,047.21/103,573.11 = 19,127.81/x
  3. Step 3: Cross multiply
    69,047.21x = 103,573.11 × 19,127.81
  4. Step 4: Simplify right side
    69,047.21x = 1,981,126,769.19
  5. Step 5: Solve for x
    x = 1,981,126,769.19/69,047.21
  6. Step 6: Final answer
    x = 28,692.35

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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.