Home / 87,578.16-131,385.69-28,409.21

Finding the Fourth Proportional to 87,578.16, 131,385.69 and 28,409.21

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Solution

The fourth proportional to 87,578.16, 131,385.69 and 28,409.21 is: 42,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,578.16 : 131,385.69 = 28,409.21 : x
  2. Step 2: Convert to fraction form
    87,578.16/131,385.69 = 28,409.21/x
  3. Step 3: Cross multiply
    87,578.16x = 131,385.69 × 28,409.21
  4. Step 4: Simplify right side
    87,578.16x = 3,732,563,658.20
  5. Step 5: Solve for x
    x = 3,732,563,658.20/87,578.16
  6. Step 6: Final answer
    x = 42,619.80

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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.