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Finding the Fourth Proportional to 103,692.45, 143,021.82 and 69,219.81

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Solution

The fourth proportional to 103,692.45, 143,021.82 and 69,219.81 is: 95,474.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,692.45 : 143,021.82 = 69,219.81 : x
  2. Step 2: Convert to fraction form
    103,692.45/143,021.82 = 69,219.81/x
  3. Step 3: Cross multiply
    103,692.45x = 143,021.82 × 69,219.81
  4. Step 4: Simplify right side
    103,692.45x = 9,899,943,206.25
  5. Step 5: Solve for x
    x = 9,899,943,206.25/103,692.45
  6. Step 6: Final answer
    x = 95,474.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.