Home / 103,440.20-155,160.30-68,010.80

Finding the Fourth Proportional to 103,440.20, 155,160.30 and 68,010.80

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Solution

The fourth proportional to 103,440.20, 155,160.30 and 68,010.80 is: 102,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,440.20 : 155,160.30 = 68,010.80 : x
  2. Step 2: Convert to fraction form
    103,440.20/155,160.30 = 68,010.80/x
  3. Step 3: Cross multiply
    103,440.20x = 155,160.30 × 68,010.80
  4. Step 4: Simplify right side
    103,440.20x = 10,552,576,131.24
  5. Step 5: Solve for x
    x = 10,552,576,131.24/103,440.20
  6. Step 6: Final answer
    x = 102,016.20

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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.