Home / 81,719.12-122,504.70-56,770.86

Finding the Fourth Proportional to 81,719.12, 122,504.70 and 56,770.86

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Solution

The fourth proportional to 81,719.12, 122,504.70 and 56,770.86 is: 85,104.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,719.12 : 122,504.70 = 56,770.86 : x
  2. Step 2: Convert to fraction form
    81,719.12/122,504.70 = 56,770.86/x
  3. Step 3: Cross multiply
    81,719.12x = 122,504.70 × 56,770.86
  4. Step 4: Simplify right side
    81,719.12x = 6,954,697,173.04
  5. Step 5: Solve for x
    x = 6,954,697,173.04/81,719.12
  6. Step 6: Final answer
    x = 85,104.90

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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.