Home / 142,023.84-195,993.60-78,361.68

Finding the Fourth Proportional to 142,023.84, 195,993.60 and 78,361.68

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Solution

The fourth proportional to 142,023.84, 195,993.60 and 78,361.68 is: 108,139.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,023.84 : 195,993.60 = 78,361.68 : x
  2. Step 2: Convert to fraction form
    142,023.84/195,993.60 = 78,361.68/x
  3. Step 3: Cross multiply
    142,023.84x = 195,993.60 × 78,361.68
  4. Step 4: Simplify right side
    142,023.84x = 15,358,387,765.25
  5. Step 5: Solve for x
    x = 15,358,387,765.25/142,023.84
  6. Step 6: Final answer
    x = 108,139.51

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1.5x scale

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.