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Finding the Fourth Proportional to 186,288.71, 279,276.32 and 81,028.40

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Solution

The fourth proportional to 186,288.71, 279,276.32 and 81,028.40 is: 121,474.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,288.71 : 279,276.32 = 81,028.40 : x
  2. Step 2: Convert to fraction form
    186,288.71/279,276.32 = 81,028.40/x
  3. Step 3: Cross multiply
    186,288.71x = 279,276.32 × 81,028.40
  4. Step 4: Simplify right side
    186,288.71x = 22,629,313,367.49
  5. Step 5: Solve for x
    x = 22,629,313,367.49/186,288.71
  6. Step 6: Final answer
    x = 121,474.42

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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.