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Finding the Fourth Proportional to 73,179.56, 100,987.80 and 39,645.56

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Solution

The fourth proportional to 73,179.56, 100,987.80 and 39,645.56 is: 54,710.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,179.56 : 100,987.80 = 39,645.56 : x
  2. Step 2: Convert to fraction form
    73,179.56/100,987.80 = 39,645.56/x
  3. Step 3: Cross multiply
    73,179.56x = 100,987.80 × 39,645.56
  4. Step 4: Simplify right side
    73,179.56x = 4,003,717,987.97
  5. Step 5: Solve for x
    x = 4,003,717,987.97/73,179.56
  6. Step 6: Final answer
    x = 54,710.88

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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.