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Finding the Fourth Proportional to 71,983.80, 99,311.40 and 45,127.44

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Solution

The fourth proportional to 71,983.80, 99,311.40 and 45,127.44 is: 62,259.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,983.80 : 99,311.40 = 45,127.44 : x
  2. Step 2: Convert to fraction form
    71,983.80/99,311.40 = 45,127.44/x
  3. Step 3: Cross multiply
    71,983.80x = 99,311.40 × 45,127.44
  4. Step 4: Simplify right side
    71,983.80x = 4,481,669,244.82
  5. Step 5: Solve for x
    x = 4,481,669,244.82/71,983.80
  6. Step 6: Final answer
    x = 62,259.41

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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.