Home / 120,615.12-180,917.44-40,647.80

Finding the Fourth Proportional to 120,615.12, 180,917.44 and 40,647.80

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Solution

The fourth proportional to 120,615.12, 180,917.44 and 40,647.80 is: 60,969.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,615.12 : 180,917.44 = 40,647.80 : x
  2. Step 2: Convert to fraction form
    120,615.12/180,917.44 = 40,647.80/x
  3. Step 3: Cross multiply
    120,615.12x = 180,917.44 × 40,647.80
  4. Step 4: Simplify right side
    120,615.12x = 7,353,895,917.63
  5. Step 5: Solve for x
    x = 7,353,895,917.63/120,615.12
  6. Step 6: Final answer
    x = 60,969.93

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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.