Home / 80,558.20-120,722.10-55,905.40

Finding the Fourth Proportional to 80,558.20, 120,722.10 and 55,905.40

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Solution

The fourth proportional to 80,558.20, 120,722.10 and 55,905.40 is: 83,778.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,558.20 : 120,722.10 = 55,905.40 : x
  2. Step 2: Convert to fraction form
    80,558.20/120,722.10 = 55,905.40/x
  3. Step 3: Cross multiply
    80,558.20x = 120,722.10 × 55,905.40
  4. Step 4: Simplify right side
    80,558.20x = 6,749,017,289.34
  5. Step 5: Solve for x
    x = 6,749,017,289.34/80,558.20
  6. Step 6: Final answer
    x = 83,778.15

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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.