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Finding the Fourth Proportional to 71,996.34, 108,018.81 and 45,362.32

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Solution

The fourth proportional to 71,996.34, 108,018.81 and 45,362.32 is: 68,058.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,996.34 : 108,018.81 = 45,362.32 : x
  2. Step 2: Convert to fraction form
    71,996.34/108,018.81 = 45,362.32/x
  3. Step 3: Cross multiply
    71,996.34x = 108,018.81 × 45,362.32
  4. Step 4: Simplify right side
    71,996.34x = 4,899,983,825.24
  5. Step 5: Solve for x
    x = 4,899,983,825.24/71,996.34
  6. Step 6: Final answer
    x = 68,058.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.