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Finding the Fourth Proportional to 172,287.11, 258,435.53 and 47,628.11

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Solution

The fourth proportional to 172,287.11, 258,435.53 and 47,628.11 is: 71,443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,287.11 : 258,435.53 = 47,628.11 : x
  2. Step 2: Convert to fraction form
    172,287.11/258,435.53 = 47,628.11/x
  3. Step 3: Cross multiply
    172,287.11x = 258,435.53 × 47,628.11
  4. Step 4: Simplify right side
    172,287.11x = 12,308,795,850.75
  5. Step 5: Solve for x
    x = 12,308,795,850.75/172,287.11
  6. Step 6: Final answer
    x = 71,443.51

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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.