Home / 80,795.30-121,290.15-80,212.10

Finding the Fourth Proportional to 80,795.30, 121,290.15 and 80,212.10

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Solution

The fourth proportional to 80,795.30, 121,290.15 and 80,212.10 is: 120,414.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,795.30 : 121,290.15 = 80,212.10 : x
  2. Step 2: Convert to fraction form
    80,795.30/121,290.15 = 80,212.10/x
  3. Step 3: Cross multiply
    80,795.30x = 121,290.15 × 80,212.10
  4. Step 4: Simplify right side
    80,795.30x = 9,728,937,640.82
  5. Step 5: Solve for x
    x = 9,728,937,640.82/80,795.30
  6. Step 6: Final answer
    x = 120,414.65

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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.