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Finding the Fourth Proportional to 73,639.49, 110,459.77 and 21,049.61

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Solution

The fourth proportional to 73,639.49, 110,459.77 and 21,049.61 is: 31,574.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,639.49 : 110,459.77 = 21,049.61 : x
  2. Step 2: Convert to fraction form
    73,639.49/110,459.77 = 21,049.61/x
  3. Step 3: Cross multiply
    73,639.49x = 110,459.77 × 21,049.61
  4. Step 4: Simplify right side
    73,639.49x = 2,325,134,474.27
  5. Step 5: Solve for x
    x = 2,325,134,474.27/73,639.49
  6. Step 6: Final answer
    x = 31,574.56

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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.