Home / 87,390.45-131,129.21-40,005.45

Finding the Fourth Proportional to 87,390.45, 131,129.21 and 40,005.45

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Solution

The fourth proportional to 87,390.45, 131,129.21 and 40,005.45 is: 60,028.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,390.45 : 131,129.21 = 40,005.45 : x
  2. Step 2: Convert to fraction form
    87,390.45/131,129.21 = 40,005.45/x
  3. Step 3: Cross multiply
    87,390.45x = 131,129.21 × 40,005.45
  4. Step 4: Simplify right side
    87,390.45x = 5,245,883,054.19
  5. Step 5: Solve for x
    x = 5,245,883,054.19/87,390.45
  6. Step 6: Final answer
    x = 60,028.10

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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.