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Finding the Fourth Proportional to 69,372, 104,075.28 and 20,124

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Solution

The fourth proportional to 69,372, 104,075.28 and 20,124 is: 30,191.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,372 : 104,075.28 = 20,124 : x
  2. Step 2: Convert to fraction form
    69,372/104,075.28 = 20,124/x
  3. Step 3: Cross multiply
    69,372x = 104,075.28 × 20,124
  4. Step 4: Simplify right side
    69,372x = 2,094,410,934.72
  5. Step 5: Solve for x
    x = 2,094,410,934.72/69,372
  6. Step 6: Final answer
    x = 30,191.01

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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.