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Finding the Fourth Proportional to 186,318.40, 279,452.40 and 74,081.20

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Solution

The fourth proportional to 186,318.40, 279,452.40 and 74,081.20 is: 111,111.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,318.40 : 279,452.40 = 74,081.20 : x
  2. Step 2: Convert to fraction form
    186,318.40/279,452.40 = 74,081.20/x
  3. Step 3: Cross multiply
    186,318.40x = 279,452.40 × 74,081.20
  4. Step 4: Simplify right side
    186,318.40x = 20,702,169,134.88
  5. Step 5: Solve for x
    x = 20,702,169,134.88/186,318.40
  6. Step 6: Final answer
    x = 111,111.78

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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.