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Finding the Fourth Proportional to 74,097.21, 111,125.99 and 20,786.01

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Solution

The fourth proportional to 74,097.21, 111,125.99 and 20,786.01 is: 31,173.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,097.21 : 111,125.99 = 20,786.01 : x
  2. Step 2: Convert to fraction form
    74,097.21/111,125.99 = 20,786.01/x
  3. Step 3: Cross multiply
    74,097.21x = 111,125.99 × 20,786.01
  4. Step 4: Simplify right side
    74,097.21x = 2,309,865,887.18
  5. Step 5: Solve for x
    x = 2,309,865,887.18/74,097.21
  6. Step 6: Final answer
    x = 31,173.45

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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.