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Finding the Fourth Proportional to 80,519.66, 120,779.49 and 21,359.96

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Solution

The fourth proportional to 80,519.66, 120,779.49 and 21,359.96 is: 32,039.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,519.66 : 120,779.49 = 21,359.96 : x
  2. Step 2: Convert to fraction form
    80,519.66/120,779.49 = 21,359.96/x
  3. Step 3: Cross multiply
    80,519.66x = 120,779.49 × 21,359.96
  4. Step 4: Simplify right side
    80,519.66x = 2,579,845,075.22
  5. Step 5: Solve for x
    x = 2,579,845,075.22/80,519.66
  6. Step 6: Final answer
    x = 32,039.94

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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.