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Finding the Fourth Proportional to 86,049.66, 129,087.63 and 43,906.76

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Solution

The fourth proportional to 86,049.66, 129,087.63 and 43,906.76 is: 65,866.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,049.66 : 129,087.63 = 43,906.76 : x
  2. Step 2: Convert to fraction form
    86,049.66/129,087.63 = 43,906.76/x
  3. Step 3: Cross multiply
    86,049.66x = 129,087.63 × 43,906.76
  4. Step 4: Simplify right side
    86,049.66x = 5,667,818,943.94
  5. Step 5: Solve for x
    x = 5,667,818,943.94/86,049.66
  6. Step 6: Final answer
    x = 65,866.84

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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.