Home / 80,705.75-121,059.23-28,115.15

Finding the Fourth Proportional to 80,705.75, 121,059.23 and 28,115.15

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Solution

The fourth proportional to 80,705.75, 121,059.23 and 28,115.15 is: 42,172.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,705.75 : 121,059.23 = 28,115.15 : x
  2. Step 2: Convert to fraction form
    80,705.75/121,059.23 = 28,115.15/x
  3. Step 3: Cross multiply
    80,705.75x = 121,059.23 × 28,115.15
  4. Step 4: Simplify right side
    80,705.75x = 3,403,597,664.46
  5. Step 5: Solve for x
    x = 3,403,597,664.46/80,705.75
  6. Step 6: Final answer
    x = 42,172.93

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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.