Home / 260,120.43-390,211.90-91,605.94

Finding the Fourth Proportional to 260,120.43, 390,211.90 and 91,605.94

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Solution

The fourth proportional to 260,120.43, 390,211.90 and 91,605.94 is: 137,419.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,120.43 : 390,211.90 = 91,605.94 : x
  2. Step 2: Convert to fraction form
    260,120.43/390,211.90 = 91,605.94/x
  3. Step 3: Cross multiply
    260,120.43x = 390,211.90 × 91,605.94
  4. Step 4: Simplify right side
    260,120.43x = 35,745,726,694.14
  5. Step 5: Solve for x
    x = 35,745,726,694.14/260,120.43
  6. Step 6: Final answer
    x = 137,419.91

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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.