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Finding the Fourth Proportional to 81,043.68, 111,891.64 and 55,592.68

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Solution

The fourth proportional to 81,043.68, 111,891.64 and 55,592.68 is: 76,753.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,043.68 : 111,891.64 = 55,592.68 : x
  2. Step 2: Convert to fraction form
    81,043.68/111,891.64 = 55,592.68/x
  3. Step 3: Cross multiply
    81,043.68x = 111,891.64 × 55,592.68
  4. Step 4: Simplify right side
    81,043.68x = 6,220,356,137.20
  5. Step 5: Solve for x
    x = 6,220,356,137.20/81,043.68
  6. Step 6: Final answer
    x = 76,753.13

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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.