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Finding the Fourth Proportional to 66,878.56, 100,309.62 and 38,813.88

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Solution

The fourth proportional to 66,878.56, 100,309.62 and 38,813.88 is: 58,216.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,878.56 : 100,309.62 = 38,813.88 : x
  2. Step 2: Convert to fraction form
    66,878.56/100,309.62 = 38,813.88/x
  3. Step 3: Cross multiply
    66,878.56x = 100,309.62 × 38,813.88
  4. Step 4: Simplify right side
    66,878.56x = 3,893,405,553.53
  5. Step 5: Solve for x
    x = 3,893,405,553.53/66,878.56
  6. Step 6: Final answer
    x = 58,216.05

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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.