Home / 139,721.40-209,170.26-92,249.40

Finding the Fourth Proportional to 139,721.40, 209,170.26 and 92,249.40

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Solution

The fourth proportional to 139,721.40, 209,170.26 and 92,249.40 is: 138,102.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,721.40 : 209,170.26 = 92,249.40 : x
  2. Step 2: Convert to fraction form
    139,721.40/209,170.26 = 92,249.40/x
  3. Step 3: Cross multiply
    139,721.40x = 209,170.26 × 92,249.40
  4. Step 4: Simplify right side
    139,721.40x = 19,295,830,982.84
  5. Step 5: Solve for x
    x = 19,295,830,982.84/139,721.40
  6. Step 6: Final answer
    x = 138,102.19

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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.