Home / 142,021.80-195,991.14-78,361.92

Finding the Fourth Proportional to 142,021.80, 195,991.14 and 78,361.92

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Solution

The fourth proportional to 142,021.80, 195,991.14 and 78,361.92 is: 108,140.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,021.80 : 195,991.14 = 78,361.92 : x
  2. Step 2: Convert to fraction form
    142,021.80/195,991.14 = 78,361.92/x
  3. Step 3: Cross multiply
    142,021.80x = 195,991.14 × 78,361.92
  4. Step 4: Simplify right side
    142,021.80x = 15,358,242,033.39
  5. Step 5: Solve for x
    x = 15,358,242,033.39/142,021.80
  6. Step 6: Final answer
    x = 108,140.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.