Home / 100,450.42-150,675.62-78,280.38

Finding the Fourth Proportional to 100,450.42, 150,675.62 and 78,280.38

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Solution

The fourth proportional to 100,450.42, 150,675.62 and 78,280.38 is: 117,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,450.42 : 150,675.62 = 78,280.38 : x
  2. Step 2: Convert to fraction form
    100,450.42/150,675.62 = 78,280.38/x
  3. Step 3: Cross multiply
    100,450.42x = 150,675.62 × 78,280.38
  4. Step 4: Simplify right side
    100,450.42x = 11,794,944,398.93
  5. Step 5: Solve for x
    x = 11,794,944,398.93/100,450.42
  6. Step 6: Final answer
    x = 117,420.56

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1.5x scale

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.