Home / 68,090.55-102,135.60-20,705.33

Finding the Fourth Proportional to 68,090.55, 102,135.60 and 20,705.33

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Solution

The fourth proportional to 68,090.55, 102,135.60 and 20,705.33 is: 31,057.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,090.55 : 102,135.60 = 20,705.33 : x
  2. Step 2: Convert to fraction form
    68,090.55/102,135.60 = 20,705.33/x
  3. Step 3: Cross multiply
    68,090.55x = 102,135.60 × 20,705.33
  4. Step 4: Simplify right side
    68,090.55x = 2,114,750,792.07
  5. Step 5: Solve for x
    x = 2,114,750,792.07/68,090.55
  6. Step 6: Final answer
    x = 31,057.92

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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.