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Finding the Fourth Proportional to 72,905.88, 100,610.11 and 39,371.88

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Solution

The fourth proportional to 72,905.88, 100,610.11 and 39,371.88 is: 54,333.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,905.88 : 100,610.11 = 39,371.88 : x
  2. Step 2: Convert to fraction form
    72,905.88/100,610.11 = 39,371.88/x
  3. Step 3: Cross multiply
    72,905.88x = 100,610.11 × 39,371.88
  4. Step 4: Simplify right side
    72,905.88x = 3,961,209,177.71
  5. Step 5: Solve for x
    x = 3,961,209,177.71/72,905.88
  6. Step 6: Final answer
    x = 54,333.19

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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.