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Finding the Fourth Proportional to 186,380.89, 279,464.67 and 86,489.65

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Solution

The fourth proportional to 186,380.89, 279,464.67 and 86,489.65 is: 129,684.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,380.89 : 279,464.67 = 86,489.65 : x
  2. Step 2: Convert to fraction form
    186,380.89/279,464.67 = 86,489.65/x
  3. Step 3: Cross multiply
    186,380.89x = 279,464.67 × 86,489.65
  4. Step 4: Simplify right side
    186,380.89x = 24,170,801,495.67
  5. Step 5: Solve for x
    x = 24,170,801,495.67/186,380.89
  6. Step 6: Final answer
    x = 129,684.98

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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.