Home / 142,290.96-196,361.44-78,628.20

Finding the Fourth Proportional to 142,290.96, 196,361.44 and 78,628.20

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Solution

The fourth proportional to 142,290.96, 196,361.44 and 78,628.20 is: 108,506.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,290.96 : 196,361.44 = 78,628.20 : x
  2. Step 2: Convert to fraction form
    142,290.96/196,361.44 = 78,628.20/x
  3. Step 3: Cross multiply
    142,290.96x = 196,361.44 × 78,628.20
  4. Step 4: Simplify right side
    142,290.96x = 15,439,546,576.61
  5. Step 5: Solve for x
    x = 15,439,546,576.61/142,290.96
  6. Step 6: Final answer
    x = 108,506.87

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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.