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Finding the Fourth Proportional to 107,997.80, 161,996.70 and 80,004.20

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Solution

The fourth proportional to 107,997.80, 161,996.70 and 80,004.20 is: 120,006.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,997.80 : 161,996.70 = 80,004.20 : x
  2. Step 2: Convert to fraction form
    107,997.80/161,996.70 = 80,004.20/x
  3. Step 3: Cross multiply
    107,997.80x = 161,996.70 × 80,004.20
  4. Step 4: Simplify right side
    107,997.80x = 12,960,416,386.14
  5. Step 5: Solve for x
    x = 12,960,416,386.14/107,997.80
  6. Step 6: Final answer
    x = 120,006.30

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1.5x scale

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.