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Finding the Fourth Proportional to 71,845.84, 99,112.92 and 55,820.62

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Solution

The fourth proportional to 71,845.84, 99,112.92 and 55,820.62 is: 77,005.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,845.84 : 99,112.92 = 55,820.62 : x
  2. Step 2: Convert to fraction form
    71,845.84/99,112.92 = 55,820.62/x
  3. Step 3: Cross multiply
    71,845.84x = 99,112.92 × 55,820.62
  4. Step 4: Simplify right side
    71,845.84x = 5,532,544,644.41
  5. Step 5: Solve for x
    x = 5,532,544,644.41/71,845.84
  6. Step 6: Final answer
    x = 77,005.78

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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.