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Finding the Fourth Proportional to 73,107.45, 109,606.10 and 28,728.09

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Solution

The fourth proportional to 73,107.45, 109,606.10 and 28,728.09 is: 43,070.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,107.45 : 109,606.10 = 28,728.09 : x
  2. Step 2: Convert to fraction form
    73,107.45/109,606.10 = 28,728.09/x
  3. Step 3: Cross multiply
    73,107.45x = 109,606.10 × 28,728.09
  4. Step 4: Simplify right side
    73,107.45x = 3,148,773,761.71
  5. Step 5: Solve for x
    x = 3,148,773,761.71/73,107.45
  6. Step 6: Final answer
    x = 43,070.49

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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.