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Finding the Fourth Proportional to 72,932.10, 109,179.45 and 68,606.70

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Solution

The fourth proportional to 72,932.10, 109,179.45 and 68,606.70 is: 102,704.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,932.10 : 109,179.45 = 68,606.70 : x
  2. Step 2: Convert to fraction form
    72,932.10/109,179.45 = 68,606.70/x
  3. Step 3: Cross multiply
    72,932.10x = 109,179.45 × 68,606.70
  4. Step 4: Simplify right side
    72,932.10x = 7,490,441,772.32
  5. Step 5: Solve for x
    x = 7,490,441,772.32/72,932.10
  6. Step 6: Final answer
    x = 102,704.32

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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.