Home / 87,257.10-130,857.90-28,078.98

Finding the Fourth Proportional to 87,257.10, 130,857.90 and 28,078.98

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Solution

The fourth proportional to 87,257.10, 130,857.90 and 28,078.98 is: 42,109.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,257.10 : 130,857.90 = 28,078.98 : x
  2. Step 2: Convert to fraction form
    87,257.10/130,857.90 = 28,078.98/x
  3. Step 3: Cross multiply
    87,257.10x = 130,857.90 × 28,078.98
  4. Step 4: Simplify right side
    87,257.10x = 3,674,356,356.94
  5. Step 5: Solve for x
    x = 3,674,356,356.94/87,257.10
  6. Step 6: Final answer
    x = 42,109.54

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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.