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Finding the Fourth Proportional to 86,611.67, 129,891.53 and 30,441.30

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Solution

The fourth proportional to 86,611.67, 129,891.53 and 30,441.30 is: 45,652.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,611.67 : 129,891.53 = 30,441.30 : x
  2. Step 2: Convert to fraction form
    86,611.67/129,891.53 = 30,441.30/x
  3. Step 3: Cross multiply
    86,611.67x = 129,891.53 × 30,441.30
  4. Step 4: Simplify right side
    86,611.67x = 3,954,066,879.98
  5. Step 5: Solve for x
    x = 3,954,066,879.98/86,611.67
  6. Step 6: Final answer
    x = 45,652.82

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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.