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Finding the Fourth Proportional to 109,281.44, 150,788.84 and 66,255.86

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Solution

The fourth proportional to 109,281.44, 150,788.84 and 66,255.86 is: 91,421.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,281.44 : 150,788.84 = 66,255.86 : x
  2. Step 2: Convert to fraction form
    109,281.44/150,788.84 = 66,255.86/x
  3. Step 3: Cross multiply
    109,281.44x = 150,788.84 × 66,255.86
  4. Step 4: Simplify right side
    109,281.44x = 9,990,644,272.60
  5. Step 5: Solve for x
    x = 9,990,644,272.60/109,281.44
  6. Step 6: Final answer
    x = 91,421.24

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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.