Home / 80,585.07-120,877.45-21,420.73

Finding the Fourth Proportional to 80,585.07, 120,877.45 and 21,420.73

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Solution

The fourth proportional to 80,585.07, 120,877.45 and 21,420.73 is: 32,131.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,585.07 : 120,877.45 = 21,420.73 : x
  2. Step 2: Convert to fraction form
    80,585.07/120,877.45 = 21,420.73/x
  3. Step 3: Cross multiply
    80,585.07x = 120,877.45 × 21,420.73
  4. Step 4: Simplify right side
    80,585.07x = 2,589,283,219.54
  5. Step 5: Solve for x
    x = 2,589,283,219.54/80,585.07
  6. Step 6: Final answer
    x = 32,131.05

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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.