Home / 260,121.53-390,213.56-91,607.03

Finding the Fourth Proportional to 260,121.53, 390,213.56 and 91,607.03

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Solution

The fourth proportional to 260,121.53, 390,213.56 and 91,607.03 is: 137,421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,121.53 : 390,213.56 = 91,607.03 : x
  2. Step 2: Convert to fraction form
    260,121.53/390,213.56 = 91,607.03/x
  3. Step 3: Cross multiply
    260,121.53x = 390,213.56 × 91,607.03
  4. Step 4: Simplify right side
    260,121.53x = 35,746,305,297.33
  5. Step 5: Solve for x
    x = 35,746,305,297.33/260,121.53
  6. Step 6: Final answer
    x = 137,421.56

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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.