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Finding the Fourth Proportional to 186,314.40, 279,446.40 and 74,077.20

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Solution

The fourth proportional to 186,314.40, 279,446.40 and 74,077.20 is: 111,105.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,314.40 : 279,446.40 = 74,077.20 : x
  2. Step 2: Convert to fraction form
    186,314.40/279,446.40 = 74,077.20/x
  3. Step 3: Cross multiply
    186,314.40x = 279,446.40 × 74,077.20
  4. Step 4: Simplify right side
    186,314.40x = 20,700,606,862.08
  5. Step 5: Solve for x
    x = 20,700,606,862.08/186,314.40
  6. Step 6: Final answer
    x = 111,105.78

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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.