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Finding the Fourth Proportional to 84,613.88, 126,927.20 and 28,454.15

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Solution

The fourth proportional to 84,613.88, 126,927.20 and 28,454.15 is: 42,683.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,613.88 : 126,927.20 = 28,454.15 : x
  2. Step 2: Convert to fraction form
    84,613.88/126,927.20 = 28,454.15/x
  3. Step 3: Cross multiply
    84,613.88x = 126,927.20 × 28,454.15
  4. Step 4: Simplify right side
    84,613.88x = 3,611,605,976.33
  5. Step 5: Solve for x
    x = 3,611,605,976.33/84,613.88
  6. Step 6: Final answer
    x = 42,683.37

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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.