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Finding the Fourth Proportional to 73,172.13, 100,977.56 and 39,638.13

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Solution

The fourth proportional to 73,172.13, 100,977.56 and 39,638.13 is: 54,700.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,172.13 : 100,977.56 = 39,638.13 : x
  2. Step 2: Convert to fraction form
    73,172.13/100,977.56 = 39,638.13/x
  3. Step 3: Cross multiply
    73,172.13x = 100,977.56 × 39,638.13
  4. Step 4: Simplify right side
    73,172.13x = 4,002,561,650.36
  5. Step 5: Solve for x
    x = 4,002,561,650.36/73,172.13
  6. Step 6: Final answer
    x = 54,700.63

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1.5x scale

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.