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Finding the Fourth Proportional to 80,407.91, 120,621.18 and 30,525.28

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Solution

The fourth proportional to 80,407.91, 120,621.18 and 30,525.28 is: 45,791.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,407.91 : 120,621.18 = 30,525.28 : x
  2. Step 2: Convert to fraction form
    80,407.91/120,621.18 = 30,525.28/x
  3. Step 3: Cross multiply
    80,407.91x = 120,621.18 × 30,525.28
  4. Step 4: Simplify right side
    80,407.91x = 3,681,995,293.43
  5. Step 5: Solve for x
    x = 3,681,995,293.43/80,407.91
  6. Step 6: Final answer
    x = 45,791.46

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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.