Home / 80,021.40-119,919.42-61,228.68

Finding the Fourth Proportional to 80,021.40, 119,919.42 and 61,228.68

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Solution

The fourth proportional to 80,021.40, 119,919.42 and 61,228.68 is: 91,756.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,021.40 : 119,919.42 = 61,228.68 : x
  2. Step 2: Convert to fraction form
    80,021.40/119,919.42 = 61,228.68/x
  3. Step 3: Cross multiply
    80,021.40x = 119,919.42 × 61,228.68
  4. Step 4: Simplify right side
    80,021.40x = 7,342,507,792.97
  5. Step 5: Solve for x
    x = 7,342,507,792.97/80,021.40
  6. Step 6: Final answer
    x = 91,756.80

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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.