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Finding the Fourth Proportional to 72,009.66, 107,982.99 and 38,268.34

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Solution

The fourth proportional to 72,009.66, 107,982.99 and 38,268.34 is: 57,385.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,009.66 : 107,982.99 = 38,268.34 : x
  2. Step 2: Convert to fraction form
    72,009.66/107,982.99 = 38,268.34/x
  3. Step 3: Cross multiply
    72,009.66x = 107,982.99 × 38,268.34
  4. Step 4: Simplify right side
    72,009.66x = 4,132,329,505.58
  5. Step 5: Solve for x
    x = 4,132,329,505.58/72,009.66
  6. Step 6: Final answer
    x = 57,385.76

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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.