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Finding the Fourth Proportional to 73,179.38, 100,987.56 and 39,645.38

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Solution

The fourth proportional to 73,179.38, 100,987.56 and 39,645.38 is: 54,710.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,179.38 : 100,987.56 = 39,645.38 : x
  2. Step 2: Convert to fraction form
    73,179.38/100,987.56 = 39,645.38/x
  3. Step 3: Cross multiply
    73,179.38x = 100,987.56 × 39,645.38
  4. Step 4: Simplify right side
    73,179.38x = 4,003,689,686.54
  5. Step 5: Solve for x
    x = 4,003,689,686.54/73,179.38
  6. Step 6: Final answer
    x = 54,710.63

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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.