Home / 80,784.30-121,174.68-21,619.96

Finding the Fourth Proportional to 80,784.30, 121,174.68 and 21,619.96

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Solution

The fourth proportional to 80,784.30, 121,174.68 and 21,619.96 is: 32,429.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,784.30 : 121,174.68 = 21,619.96 : x
  2. Step 2: Convert to fraction form
    80,784.30/121,174.68 = 21,619.96/x
  3. Step 3: Cross multiply
    80,784.30x = 121,174.68 × 21,619.96
  4. Step 4: Simplify right side
    80,784.30x = 2,619,791,734.61
  5. Step 5: Solve for x
    x = 2,619,791,734.61/80,784.30
  6. Step 6: Final answer
    x = 32,429.47

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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.