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Finding the Fourth Proportional to 103,879.68, 155,803.68 and 28,992

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Solution

The fourth proportional to 103,879.68, 155,803.68 and 28,992 is: 43,483.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,879.68 : 155,803.68 = 28,992 : x
  2. Step 2: Convert to fraction form
    103,879.68/155,803.68 = 28,992/x
  3. Step 3: Cross multiply
    103,879.68x = 155,803.68 × 28,992
  4. Step 4: Simplify right side
    103,879.68x = 4,517,060,290.56
  5. Step 5: Solve for x
    x = 4,517,060,290.56/103,879.68
  6. Step 6: Final answer
    x = 43,483.58

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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.