Home / 80,779.33-121,159.73-21,619.62

Finding the Fourth Proportional to 80,779.33, 121,159.73 and 21,619.62

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Solution

The fourth proportional to 80,779.33, 121,159.73 and 21,619.62 is: 32,426.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,779.33 : 121,159.73 = 21,619.62 : x
  2. Step 2: Convert to fraction form
    80,779.33/121,159.73 = 21,619.62/x
  3. Step 3: Cross multiply
    80,779.33x = 121,159.73 × 21,619.62
  4. Step 4: Simplify right side
    80,779.33x = 2,619,426,608.01
  5. Step 5: Solve for x
    x = 2,619,426,608.01/80,779.33
  6. Step 6: Final answer
    x = 32,426.94

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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.