Home / 68,128.72-102,208.44-20,748.04

Finding the Fourth Proportional to 68,128.72, 102,208.44 and 20,748.04

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Solution

The fourth proportional to 68,128.72, 102,208.44 and 20,748.04 is: 31,126.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,128.72 : 102,208.44 = 20,748.04 : x
  2. Step 2: Convert to fraction form
    68,128.72/102,208.44 = 20,748.04/x
  3. Step 3: Cross multiply
    68,128.72x = 102,208.44 × 20,748.04
  4. Step 4: Simplify right side
    68,128.72x = 2,120,624,801.46
  5. Step 5: Solve for x
    x = 2,120,624,801.46/68,128.72
  6. Step 6: Final answer
    x = 31,126.74

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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.