Home / 260,121.09-390,212.87-91,606.56

Finding the Fourth Proportional to 260,121.09, 390,212.87 and 91,606.56

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Solution

The fourth proportional to 260,121.09, 390,212.87 and 91,606.56 is: 137,420.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,121.09 : 390,212.87 = 91,606.56 : x
  2. Step 2: Convert to fraction form
    260,121.09/390,212.87 = 91,606.56/x
  3. Step 3: Cross multiply
    260,121.09x = 390,212.87 × 91,606.56
  4. Step 4: Simplify right side
    260,121.09x = 35,746,058,688.43
  5. Step 5: Solve for x
    x = 35,746,058,688.43/260,121.09
  6. Step 6: Final answer
    x = 137,420.84

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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.