Home / 207,683.10-311,508.45-81,298.80

Finding the Fourth Proportional to 207,683.10, 311,508.45 and 81,298.80

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Solution

The fourth proportional to 207,683.10, 311,508.45 and 81,298.80 is: 121,941.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,683.10 : 311,508.45 = 81,298.80 : x
  2. Step 2: Convert to fraction form
    207,683.10/311,508.45 = 81,298.80/x
  3. Step 3: Cross multiply
    207,683.10x = 311,508.45 × 81,298.80
  4. Step 4: Simplify right side
    207,683.10x = 25,325,263,174.86
  5. Step 5: Solve for x
    x = 25,325,263,174.86/207,683.10
  6. Step 6: Final answer
    x = 121,941.86

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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.