Home / 103,879.44-143,354.28-78,685.20

Finding the Fourth Proportional to 103,879.44, 143,354.28 and 78,685.20

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Solution

The fourth proportional to 103,879.44, 143,354.28 and 78,685.20 is: 108,586.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,879.44 : 143,354.28 = 78,685.20 : x
  2. Step 2: Convert to fraction form
    103,879.44/143,354.28 = 78,685.20/x
  3. Step 3: Cross multiply
    103,879.44x = 143,354.28 × 78,685.20
  4. Step 4: Simplify right side
    103,879.44x = 11,279,860,192.66
  5. Step 5: Solve for x
    x = 11,279,860,192.66/103,879.44
  6. Step 6: Final answer
    x = 108,586.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.