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Finding the Fourth Proportional to 69,219.95, 103,839.93 and 21,819.02

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Solution

The fourth proportional to 69,219.95, 103,839.93 and 21,819.02 is: 32,731.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,219.95 : 103,839.93 = 21,819.02 : x
  2. Step 2: Convert to fraction form
    69,219.95/103,839.93 = 21,819.02/x
  3. Step 3: Cross multiply
    69,219.95x = 103,839.93 × 21,819.02
  4. Step 4: Simplify right side
    69,219.95x = 2,265,684,990.27
  5. Step 5: Solve for x
    x = 2,265,684,990.27/69,219.95
  6. Step 6: Final answer
    x = 32,731.68

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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.