Home / 68,128.22-102,180.30-20,731.88

Finding the Fourth Proportional to 68,128.22, 102,180.30 and 20,731.88

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Solution

The fourth proportional to 68,128.22, 102,180.30 and 20,731.88 is: 31,094.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,128.22 : 102,180.30 = 20,731.88 : x
  2. Step 2: Convert to fraction form
    68,128.22/102,180.30 = 20,731.88/x
  3. Step 3: Cross multiply
    68,128.22x = 102,180.30 × 20,731.88
  4. Step 4: Simplify right side
    68,128.22x = 2,118,389,717.96
  5. Step 5: Solve for x
    x = 2,118,389,717.96/68,128.22
  6. Step 6: Final answer
    x = 31,094.16

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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.