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Finding the Fourth Proportional to 139,568.60, 209,352.90 and 100,202.60

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Solution

The fourth proportional to 139,568.60, 209,352.90 and 100,202.60 is: 150,303.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,568.60 : 209,352.90 = 100,202.60 : x
  2. Step 2: Convert to fraction form
    139,568.60/209,352.90 = 100,202.60/x
  3. Step 3: Cross multiply
    139,568.60x = 209,352.90 × 100,202.60
  4. Step 4: Simplify right side
    139,568.60x = 20,977,704,897.54
  5. Step 5: Solve for x
    x = 20,977,704,897.54/139,568.60
  6. Step 6: Final answer
    x = 150,303.90

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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.