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Finding the Fourth Proportional to 66,991.28, 100,410.47 and 26,984.64

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Solution

The fourth proportional to 66,991.28, 100,410.47 and 26,984.64 is: 40,446.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,991.28 : 100,410.47 = 26,984.64 : x
  2. Step 2: Convert to fraction form
    66,991.28/100,410.47 = 26,984.64/x
  3. Step 3: Cross multiply
    66,991.28x = 100,410.47 × 26,984.64
  4. Step 4: Simplify right side
    66,991.28x = 2,709,540,727.99
  5. Step 5: Solve for x
    x = 2,709,540,727.99/66,991.28
  6. Step 6: Final answer
    x = 40,446.17

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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.