Home / 120,086.85-180,109.83-40,115.76

Finding the Fourth Proportional to 120,086.85, 180,109.83 and 40,115.76

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Solution

The fourth proportional to 120,086.85, 180,109.83 and 40,115.76 is: 60,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,086.85 : 180,109.83 = 40,115.76 : x
  2. Step 2: Convert to fraction form
    120,086.85/180,109.83 = 40,115.76/x
  3. Step 3: Cross multiply
    120,086.85x = 180,109.83 × 40,115.76
  4. Step 4: Simplify right side
    120,086.85x = 7,225,241,963.29
  5. Step 5: Solve for x
    x = 7,225,241,963.29/120,086.85
  6. Step 6: Final answer
    x = 60,166.80

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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.