Home / 139,739.10-209,346.20-108,421.26

Finding the Fourth Proportional to 139,739.10, 209,346.20 and 108,421.26

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Solution

The fourth proportional to 139,739.10, 209,346.20 and 108,421.26 is: 162,428.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,739.10 : 209,346.20 = 108,421.26 : x
  2. Step 2: Convert to fraction form
    139,739.10/209,346.20 = 108,421.26/x
  3. Step 3: Cross multiply
    139,739.10x = 209,346.20 × 108,421.26
  4. Step 4: Simplify right side
    139,739.10x = 22,697,578,780.21
  5. Step 5: Solve for x
    x = 22,697,578,780.21/139,739.10
  6. Step 6: Final answer
    x = 162,428.26

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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.