Home / 86,745.90-130,168.07-39,998.78

Finding the Fourth Proportional to 86,745.90, 130,168.07 and 39,998.78

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Solution

The fourth proportional to 86,745.90, 130,168.07 and 39,998.78 is: 60,020.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,745.90 : 130,168.07 = 39,998.78 : x
  2. Step 2: Convert to fraction form
    86,745.90/130,168.07 = 39,998.78/x
  3. Step 3: Cross multiply
    86,745.90x = 130,168.07 × 39,998.78
  4. Step 4: Simplify right side
    86,745.90x = 5,206,563,994.95
  5. Step 5: Solve for x
    x = 5,206,563,994.95/86,745.90
  6. Step 6: Final answer
    x = 60,020.87

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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.