Home / 80,779.83-121,160.48-21,620.12

Finding the Fourth Proportional to 80,779.83, 121,160.48 and 21,620.12

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Solution

The fourth proportional to 80,779.83, 121,160.48 and 21,620.12 is: 32,427.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,779.83 : 121,160.48 = 21,620.12 : x
  2. Step 2: Convert to fraction form
    80,779.83/121,160.48 = 21,620.12/x
  3. Step 3: Cross multiply
    80,779.83x = 121,160.48 × 21,620.12
  4. Step 4: Simplify right side
    80,779.83x = 2,619,503,402.95
  5. Step 5: Solve for x
    x = 2,619,503,402.95/80,779.83
  6. Step 6: Final answer
    x = 32,427.69

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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.