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Finding the Fourth Proportional to 120,605.67, 180,911.21 and 45,761.04

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Solution

The fourth proportional to 120,605.67, 180,911.21 and 45,761.04 is: 68,642.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,605.67 : 180,911.21 = 45,761.04 : x
  2. Step 2: Convert to fraction form
    120,605.67/180,911.21 = 45,761.04/x
  3. Step 3: Cross multiply
    120,605.67x = 180,911.21 × 45,761.04
  4. Step 4: Simplify right side
    120,605.67x = 8,278,684,888.45
  5. Step 5: Solve for x
    x = 8,278,684,888.45/120,605.67
  6. Step 6: Final answer
    x = 68,642.58

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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.