Home / 80,583.56-120,875.21-21,419.23

Finding the Fourth Proportional to 80,583.56, 120,875.21 and 21,419.23

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Solution

The fourth proportional to 80,583.56, 120,875.21 and 21,419.23 is: 32,128.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,583.56 : 120,875.21 = 21,419.23 : x
  2. Step 2: Convert to fraction form
    80,583.56/120,875.21 = 21,419.23/x
  3. Step 3: Cross multiply
    80,583.56x = 120,875.21 × 21,419.23
  4. Step 4: Simplify right side
    80,583.56x = 2,589,053,924.29
  5. Step 5: Solve for x
    x = 2,589,053,924.29/80,583.56
  6. Step 6: Final answer
    x = 32,128.81

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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.