Home / 260,121.03-390,212.81-91,606.53

Finding the Fourth Proportional to 260,121.03, 390,212.81 and 91,606.53

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Solution

The fourth proportional to 260,121.03, 390,212.81 and 91,606.53 is: 137,420.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,121.03 : 390,212.81 = 91,606.53 : x
  2. Step 2: Convert to fraction form
    260,121.03/390,212.81 = 91,606.53/x
  3. Step 3: Cross multiply
    260,121.03x = 390,212.81 × 91,606.53
  4. Step 4: Simplify right side
    260,121.03x = 35,746,041,485.65
  5. Step 5: Solve for x
    x = 35,746,041,485.65/260,121.03
  6. Step 6: Final answer
    x = 137,420.81

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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.