Home / 87,021.28-130,297.68-45,380.32

Finding the Fourth Proportional to 87,021.28, 130,297.68 and 45,380.32

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Solution

The fourth proportional to 87,021.28, 130,297.68 and 45,380.32 is: 67,948.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,021.28 : 130,297.68 = 45,380.32 : x
  2. Step 2: Convert to fraction form
    87,021.28/130,297.68 = 45,380.32/x
  3. Step 3: Cross multiply
    87,021.28x = 130,297.68 × 45,380.32
  4. Step 4: Simplify right side
    87,021.28x = 5,912,950,413.66
  5. Step 5: Solve for x
    x = 5,912,950,413.66/87,021.28
  6. Step 6: Final answer
    x = 67,948.33

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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.