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Finding the Fourth Proportional to 66,726.87, 100,090.31 and 47,109.48

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Solution

The fourth proportional to 66,726.87, 100,090.31 and 47,109.48 is: 70,664.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,726.87 : 100,090.31 = 47,109.48 : x
  2. Step 2: Convert to fraction form
    66,726.87/100,090.31 = 47,109.48/x
  3. Step 3: Cross multiply
    66,726.87x = 100,090.31 × 47,109.48
  4. Step 4: Simplify right side
    66,726.87x = 4,715,202,221.59
  5. Step 5: Solve for x
    x = 4,715,202,221.59/66,726.87
  6. Step 6: Final answer
    x = 70,664.22

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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.