Home / 260,073.20-390,126.82-80,136.56

Finding the Fourth Proportional to 260,073.20, 390,126.82 and 80,136.56

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Solution

The fourth proportional to 260,073.20, 390,126.82 and 80,136.56 is: 120,210.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,073.20 : 390,126.82 = 80,136.56 : x
  2. Step 2: Convert to fraction form
    260,073.20/390,126.82 = 80,136.56/x
  3. Step 3: Cross multiply
    260,073.20x = 390,126.82 × 80,136.56
  4. Step 4: Simplify right side
    260,073.20x = 31,263,421,318.54
  5. Step 5: Solve for x
    x = 31,263,421,318.54/260,073.20
  6. Step 6: Final answer
    x = 120,210.08

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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.