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Finding the Fourth Proportional to 120,739.60, 180,936.60 and 88,901.20

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Solution

The fourth proportional to 120,739.60, 180,936.60 and 88,901.20 is: 133,224.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,739.60 : 180,936.60 = 88,901.20 : x
  2. Step 2: Convert to fraction form
    120,739.60/180,936.60 = 88,901.20/x
  3. Step 3: Cross multiply
    120,739.60x = 180,936.60 × 88,901.20
  4. Step 4: Simplify right side
    120,739.60x = 16,085,480,863.92
  5. Step 5: Solve for x
    x = 16,085,480,863.92/120,739.60
  6. Step 6: Final answer
    x = 133,224.57

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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.