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Finding the Fourth Proportional to 73,154, 100,952.54 and 39,620

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Solution

The fourth proportional to 73,154, 100,952.54 and 39,620 is: 54,675.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,154 : 100,952.54 = 39,620 : x
  2. Step 2: Convert to fraction form
    73,154/100,952.54 = 39,620/x
  3. Step 3: Cross multiply
    73,154x = 100,952.54 × 39,620
  4. Step 4: Simplify right side
    73,154x = 3,999,739,634.80
  5. Step 5: Solve for x
    x = 3,999,739,634.80/73,154
  6. Step 6: Final answer
    x = 54,675.61

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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.