Home / 260,072.46-390,125.69-80,135.82

Finding the Fourth Proportional to 260,072.46, 390,125.69 and 80,135.82

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Solution

The fourth proportional to 260,072.46, 390,125.69 and 80,135.82 is: 120,208.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,072.46 : 390,125.69 = 80,135.82 : x
  2. Step 2: Convert to fraction form
    260,072.46/390,125.69 = 80,135.82/x
  3. Step 3: Cross multiply
    260,072.46x = 390,125.69 × 80,135.82
  4. Step 4: Simplify right side
    260,072.46x = 31,263,041,670.54
  5. Step 5: Solve for x
    x = 31,263,041,670.54/260,072.46
  6. Step 6: Final answer
    x = 120,208.97

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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.