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Finding the Fourth Proportional to 86,659.67, 129,989.16 and 27,499.95

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Solution

The fourth proportional to 86,659.67, 129,989.16 and 27,499.95 is: 41,249.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,659.67 : 129,989.16 = 27,499.95 : x
  2. Step 2: Convert to fraction form
    86,659.67/129,989.16 = 27,499.95/x
  3. Step 3: Cross multiply
    86,659.67x = 129,989.16 × 27,499.95
  4. Step 4: Simplify right side
    86,659.67x = 3,574,695,400.54
  5. Step 5: Solve for x
    x = 3,574,695,400.54/86,659.67
  6. Step 6: Final answer
    x = 41,249.81

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.