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Finding the Fourth Proportional to 139,892.22, 209,900.36 and 73,316.54

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Solution

The fourth proportional to 139,892.22, 209,900.36 and 73,316.54 is: 110,007.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,892.22 : 209,900.36 = 73,316.54 : x
  2. Step 2: Convert to fraction form
    139,892.22/209,900.36 = 73,316.54/x
  3. Step 3: Cross multiply
    139,892.22x = 209,900.36 × 73,316.54
  4. Step 4: Simplify right side
    139,892.22x = 15,389,168,139.95
  5. Step 5: Solve for x
    x = 15,389,168,139.95/139,892.22
  6. Step 6: Final answer
    x = 110,007.32

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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.