Home / 79,911.36-119,869.20-20,745.72

Finding the Fourth Proportional to 79,911.36, 119,869.20 and 20,745.72

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Solution

The fourth proportional to 79,911.36, 119,869.20 and 20,745.72 is: 31,119.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,911.36 : 119,869.20 = 20,745.72 : x
  2. Step 2: Convert to fraction form
    79,911.36/119,869.20 = 20,745.72/x
  3. Step 3: Cross multiply
    79,911.36x = 119,869.20 × 20,745.72
  4. Step 4: Simplify right side
    79,911.36x = 2,486,772,859.82
  5. Step 5: Solve for x
    x = 2,486,772,859.82/79,911.36
  6. Step 6: Final answer
    x = 31,119.14

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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.