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Finding the Fourth Proportional to 86,433.56, 129,620.33 and 30,272.42

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Solution

The fourth proportional to 86,433.56, 129,620.33 and 30,272.42 is: 45,398.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,433.56 : 129,620.33 = 30,272.42 : x
  2. Step 2: Convert to fraction form
    86,433.56/129,620.33 = 30,272.42/x
  3. Step 3: Cross multiply
    86,433.56x = 129,620.33 × 30,272.42
  4. Step 4: Simplify right side
    86,433.56x = 3,923,920,422.20
  5. Step 5: Solve for x
    x = 3,923,920,422.20/86,433.56
  6. Step 6: Final answer
    x = 45,398.11

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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.