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Finding the Fourth Proportional to 64,860.75, 97,296.39 and 20,490.03

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Solution

The fourth proportional to 64,860.75, 97,296.39 and 20,490.03 is: 30,736.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,860.75 : 97,296.39 = 20,490.03 : x
  2. Step 2: Convert to fraction form
    64,860.75/97,296.39 = 20,490.03/x
  3. Step 3: Cross multiply
    64,860.75x = 97,296.39 × 20,490.03
  4. Step 4: Simplify right side
    64,860.75x = 1,993,605,949.99
  5. Step 5: Solve for x
    x = 1,993,605,949.99/64,860.75
  6. Step 6: Final answer
    x = 30,736.71

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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.