Home / 103,839.60-155,759.40-68,410.20

Finding the Fourth Proportional to 103,839.60, 155,759.40 and 68,410.20

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Solution

The fourth proportional to 103,839.60, 155,759.40 and 68,410.20 is: 102,615.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,839.60 : 155,759.40 = 68,410.20 : x
  2. Step 2: Convert to fraction form
    103,839.60/155,759.40 = 68,410.20/x
  3. Step 3: Cross multiply
    103,839.60x = 155,759.40 × 68,410.20
  4. Step 4: Simplify right side
    103,839.60x = 10,655,531,705.88
  5. Step 5: Solve for x
    x = 10,655,531,705.88/103,839.60
  6. Step 6: Final answer
    x = 102,615.30

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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.