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Finding the Fourth Proportional to 73,188, 100,999.51 and 39,654

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Solution

The fourth proportional to 73,188, 100,999.51 and 39,654 is: 54,722.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,188 : 100,999.51 = 39,654 : x
  2. Step 2: Convert to fraction form
    73,188/100,999.51 = 39,654/x
  3. Step 3: Cross multiply
    73,188x = 100,999.51 × 39,654
  4. Step 4: Simplify right side
    73,188x = 4,005,034,470.41
  5. Step 5: Solve for x
    x = 4,005,034,470.41/73,188
  6. Step 6: Final answer
    x = 54,722.56

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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.