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Finding the Fourth Proportional to 120,003.90, 180,005.85 and 88,511.10

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Solution

The fourth proportional to 120,003.90, 180,005.85 and 88,511.10 is: 132,766.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,003.90 : 180,005.85 = 88,511.10 : x
  2. Step 2: Convert to fraction form
    120,003.90/180,005.85 = 88,511.10/x
  3. Step 3: Cross multiply
    120,003.90x = 180,005.85 × 88,511.10
  4. Step 4: Simplify right side
    120,003.90x = 15,932,515,789.94
  5. Step 5: Solve for x
    x = 15,932,515,789.94/120,003.90
  6. Step 6: Final answer
    x = 132,766.65

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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.