Home / 205,835.40-308,621.70-87,445.80

Finding the Fourth Proportional to 205,835.40, 308,621.70 and 87,445.80

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Solution

The fourth proportional to 205,835.40, 308,621.70 and 87,445.80 is: 131,112.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,835.40 : 308,621.70 = 87,445.80 : x
  2. Step 2: Convert to fraction form
    205,835.40/308,621.70 = 87,445.80/x
  3. Step 3: Cross multiply
    205,835.40x = 308,621.70 × 87,445.80
  4. Step 4: Simplify right side
    205,835.40x = 26,987,671,453.86
  5. Step 5: Solve for x
    x = 26,987,671,453.86/205,835.40
  6. Step 6: Final answer
    x = 131,112.88

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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.