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Finding the Fourth Proportional to 139,450.92, 209,154.36 and 115,909.68

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Solution

The fourth proportional to 139,450.92, 209,154.36 and 115,909.68 is: 173,846.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,450.92 : 209,154.36 = 115,909.68 : x
  2. Step 2: Convert to fraction form
    139,450.92/209,154.36 = 115,909.68/x
  3. Step 3: Cross multiply
    139,450.92x = 209,154.36 × 115,909.68
  4. Step 4: Simplify right side
    139,450.92x = 24,243,014,938.20
  5. Step 5: Solve for x
    x = 24,243,014,938.20/139,450.92
  6. Step 6: Final answer
    x = 173,846.22

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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.