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Finding the Fourth Proportional to 72,622.31, 108,932.85 and 43,018.83

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Solution

The fourth proportional to 72,622.31, 108,932.85 and 43,018.83 is: 64,527.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,622.31 : 108,932.85 = 43,018.83 : x
  2. Step 2: Convert to fraction form
    72,622.31/108,932.85 = 43,018.83/x
  3. Step 3: Cross multiply
    72,622.31x = 108,932.85 × 43,018.83
  4. Step 4: Simplify right side
    72,622.31x = 4,686,163,755.57
  5. Step 5: Solve for x
    x = 4,686,163,755.57/72,622.31
  6. Step 6: Final answer
    x = 64,527.89

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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.