Home / 68,740.10-103,110.07-18,820.58

Finding the Fourth Proportional to 68,740.10, 103,110.07 and 18,820.58

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Solution

The fourth proportional to 68,740.10, 103,110.07 and 18,820.58 is: 28,230.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,740.10 : 103,110.07 = 18,820.58 : x
  2. Step 2: Convert to fraction form
    68,740.10/103,110.07 = 18,820.58/x
  3. Step 3: Cross multiply
    68,740.10x = 103,110.07 × 18,820.58
  4. Step 4: Simplify right side
    68,740.10x = 1,940,591,321.24
  5. Step 5: Solve for x
    x = 1,940,591,321.24/68,740.10
  6. Step 6: Final answer
    x = 28,230.85

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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.