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Finding the Fourth Proportional to 80,687.54, 121,031.86 and 28,096.86

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Solution

The fourth proportional to 80,687.54, 121,031.86 and 28,096.86 is: 42,145.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,687.54 : 121,031.86 = 28,096.86 : x
  2. Step 2: Convert to fraction form
    80,687.54/121,031.86 = 28,096.86/x
  3. Step 3: Cross multiply
    80,687.54x = 121,031.86 × 28,096.86
  4. Step 4: Simplify right side
    80,687.54x = 3,400,615,225.96
  5. Step 5: Solve for x
    x = 3,400,615,225.96/80,687.54
  6. Step 6: Final answer
    x = 42,145.48

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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.