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Finding the Fourth Proportional to 69,213, 103,836.84 and 19,965

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Solution

The fourth proportional to 69,213, 103,836.84 and 19,965 is: 29,952.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,213 : 103,836.84 = 19,965 : x
  2. Step 2: Convert to fraction form
    69,213/103,836.84 = 19,965/x
  3. Step 3: Cross multiply
    69,213x = 103,836.84 × 19,965
  4. Step 4: Simplify right side
    69,213x = 2,073,102,510.60
  5. Step 5: Solve for x
    x = 2,073,102,510.60/69,213
  6. Step 6: Final answer
    x = 29,952.50

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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.