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Finding the Fourth Proportional to 100,850.99, 139,173.21 and 55,528.04

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Solution

The fourth proportional to 100,850.99, 139,173.21 and 55,528.04 is: 76,628.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,850.99 : 139,173.21 = 55,528.04 : x
  2. Step 2: Convert to fraction form
    100,850.99/139,173.21 = 55,528.04/x
  3. Step 3: Cross multiply
    100,850.99x = 139,173.21 × 55,528.04
  4. Step 4: Simplify right side
    100,850.99x = 7,728,015,919.74
  5. Step 5: Solve for x
    x = 7,728,015,919.74/100,850.99
  6. Step 6: Final answer
    x = 76,628.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.