Home / 80,021.31-120,032.05-20,856.93

Finding the Fourth Proportional to 80,021.31, 120,032.05 and 20,856.93

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Solution

The fourth proportional to 80,021.31, 120,032.05 and 20,856.93 is: 31,285.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,021.31 : 120,032.05 = 20,856.93 : x
  2. Step 2: Convert to fraction form
    80,021.31/120,032.05 = 20,856.93/x
  3. Step 3: Cross multiply
    80,021.31x = 120,032.05 × 20,856.93
  4. Step 4: Simplify right side
    80,021.31x = 2,503,499,464.45
  5. Step 5: Solve for x
    x = 2,503,499,464.45/80,021.31
  6. Step 6: Final answer
    x = 31,285.41

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1.5x scale

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.