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Finding the Fourth Proportional to 230,421.31, 345,631.96 and 72,665.71

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Solution

The fourth proportional to 230,421.31, 345,631.96 and 72,665.71 is: 108,998.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,421.31 : 345,631.96 = 72,665.71 : x
  2. Step 2: Convert to fraction form
    230,421.31/345,631.96 = 72,665.71/x
  3. Step 3: Cross multiply
    230,421.31x = 345,631.96 × 72,665.71
  4. Step 4: Simplify right side
    230,421.31x = 25,115,590,998.84
  5. Step 5: Solve for x
    x = 25,115,590,998.84/230,421.31
  6. Step 6: Final answer
    x = 108,998.56

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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.