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Finding the Fourth Proportional to 187,379.88, 258,609.29 and 105,724.94

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Solution

The fourth proportional to 187,379.88, 258,609.29 and 105,724.94 is: 145,914.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,379.88 : 258,609.29 = 105,724.94 : x
  2. Step 2: Convert to fraction form
    187,379.88/258,609.29 = 105,724.94/x
  3. Step 3: Cross multiply
    187,379.88x = 258,609.29 × 105,724.94
  4. Step 4: Simplify right side
    187,379.88x = 27,341,449,847.02
  5. Step 5: Solve for x
    x = 27,341,449,847.02/187,379.88
  6. Step 6: Final answer
    x = 145,914.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.