Home / 80,627.60-120,872.20-28,030.32

Finding the Fourth Proportional to 80,627.60, 120,872.20 and 28,030.32

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Solution

The fourth proportional to 80,627.60, 120,872.20 and 28,030.32 is: 42,021.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,627.60 : 120,872.20 = 28,030.32 : x
  2. Step 2: Convert to fraction form
    80,627.60/120,872.20 = 28,030.32/x
  3. Step 3: Cross multiply
    80,627.60x = 120,872.20 × 28,030.32
  4. Step 4: Simplify right side
    80,627.60x = 3,388,086,445.10
  5. Step 5: Solve for x
    x = 3,388,086,445.10/80,627.60
  6. Step 6: Final answer
    x = 42,021.42

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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.