Home / 120,490.28-180,773.20-72,511.25

Finding the Fourth Proportional to 120,490.28, 180,773.20 and 72,511.25

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Solution

The fourth proportional to 120,490.28, 180,773.20 and 72,511.25 is: 108,789.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,490.28 : 180,773.20 = 72,511.25 : x
  2. Step 2: Convert to fraction form
    120,490.28/180,773.20 = 72,511.25/x
  3. Step 3: Cross multiply
    120,490.28x = 180,773.20 × 72,511.25
  4. Step 4: Simplify right side
    120,490.28x = 13,108,090,902.12
  5. Step 5: Solve for x
    x = 13,108,090,902.12/120,490.28
  6. Step 6: Final answer
    x = 108,789.61

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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.