Home / 120,212.55-180,146.70-67,511.52

Finding the Fourth Proportional to 120,212.55, 180,146.70 and 67,511.52

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Solution

The fourth proportional to 120,212.55, 180,146.70 and 67,511.52 is: 101,170.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,212.55 : 180,146.70 = 67,511.52 : x
  2. Step 2: Convert to fraction form
    120,212.55/180,146.70 = 67,511.52/x
  3. Step 3: Cross multiply
    120,212.55x = 180,146.70 × 67,511.52
  4. Step 4: Simplify right side
    120,212.55x = 12,161,977,539.98
  5. Step 5: Solve for x
    x = 12,161,977,539.98/120,212.55
  6. Step 6: Final answer
    x = 101,170.61

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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.