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Finding the Fourth Proportional to 42,694.99, 64,041.11 and 19,321.42

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Solution

The fourth proportional to 42,694.99, 64,041.11 and 19,321.42 is: 28,981.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,694.99 : 64,041.11 = 19,321.42 : x
  2. Step 2: Convert to fraction form
    42,694.99/64,041.11 = 19,321.42/x
  3. Step 3: Cross multiply
    42,694.99x = 64,041.11 × 19,321.42
  4. Step 4: Simplify right side
    42,694.99x = 1,237,365,183.58
  5. Step 5: Solve for x
    x = 1,237,365,183.58/42,694.99
  6. Step 6: Final answer
    x = 28,981.51

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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.