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Finding the Fourth Proportional to 120,003.20, 180,004.80 and 115,395.20

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Solution

The fourth proportional to 120,003.20, 180,004.80 and 115,395.20 is: 173,092.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,003.20 : 180,004.80 = 115,395.20 : x
  2. Step 2: Convert to fraction form
    120,003.20/180,004.80 = 115,395.20/x
  3. Step 3: Cross multiply
    120,003.20x = 180,004.80 × 115,395.20
  4. Step 4: Simplify right side
    120,003.20x = 20,771,689,896.96
  5. Step 5: Solve for x
    x = 20,771,689,896.96/120,003.20
  6. Step 6: Final answer
    x = 173,092.80

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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.