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Finding the Fourth Proportional to 71,770.06, 99,041.97 and 39,938.41

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Solution

The fourth proportional to 71,770.06, 99,041.97 and 39,938.41 is: 55,114.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,770.06 : 99,041.97 = 39,938.41 : x
  2. Step 2: Convert to fraction form
    71,770.06/99,041.97 = 39,938.41/x
  3. Step 3: Cross multiply
    71,770.06x = 99,041.97 × 39,938.41
  4. Step 4: Simplify right side
    71,770.06x = 3,955,578,805.07
  5. Step 5: Solve for x
    x = 3,955,578,805.07/71,770.06
  6. Step 6: Final answer
    x = 55,114.61

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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.