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Finding the Fourth Proportional to 139,919.02, 209,940.36 and 73,343.23

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Solution

The fourth proportional to 139,919.02, 209,940.36 and 73,343.23 is: 110,047.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,919.02 : 209,940.36 = 73,343.23 : x
  2. Step 2: Convert to fraction form
    139,919.02/209,940.36 = 73,343.23/x
  3. Step 3: Cross multiply
    139,919.02x = 209,940.36 × 73,343.23
  4. Step 4: Simplify right side
    139,919.02x = 15,397,704,109.76
  5. Step 5: Solve for x
    x = 15,397,704,109.76/139,919.02
  6. Step 6: Final answer
    x = 110,047.26

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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.