Home / 87,435.84-131,121.60-31,260.72

Finding the Fourth Proportional to 87,435.84, 131,121.60 and 31,260.72

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Solution

The fourth proportional to 87,435.84, 131,121.60 and 31,260.72 is: 46,879.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,435.84 : 131,121.60 = 31,260.72 : x
  2. Step 2: Convert to fraction form
    87,435.84/131,121.60 = 31,260.72/x
  3. Step 3: Cross multiply
    87,435.84x = 131,121.60 × 31,260.72
  4. Step 4: Simplify right side
    87,435.84x = 4,098,955,623.55
  5. Step 5: Solve for x
    x = 4,098,955,623.55/87,435.84
  6. Step 6: Final answer
    x = 46,879.58

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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.