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Finding the Fourth Proportional to 73,419, 101,318.22 and 39,885

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Solution

The fourth proportional to 73,419, 101,318.22 and 39,885 is: 55,041.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,419 : 101,318.22 = 39,885 : x
  2. Step 2: Convert to fraction form
    73,419/101,318.22 = 39,885/x
  3. Step 3: Cross multiply
    73,419x = 101,318.22 × 39,885
  4. Step 4: Simplify right side
    73,419x = 4,041,077,204.70
  5. Step 5: Solve for x
    x = 4,041,077,204.70/73,419
  6. Step 6: Final answer
    x = 55,041.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.