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Finding the Fourth Proportional to 72,936.89, 100,652.97 and 39,402.89

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Solution

The fourth proportional to 72,936.89, 100,652.97 and 39,402.89 is: 54,376.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,936.89 : 100,652.97 = 39,402.89 : x
  2. Step 2: Convert to fraction form
    72,936.89/100,652.97 = 39,402.89/x
  3. Step 3: Cross multiply
    72,936.89x = 100,652.97 × 39,402.89
  4. Step 4: Simplify right side
    72,936.89x = 3,966,017,905.08
  5. Step 5: Solve for x
    x = 3,966,017,905.08/72,936.89
  6. Step 6: Final answer
    x = 54,376.02

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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.