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Finding the Fourth Proportional to 186,659.40, 279,916.30 and 81,406.60

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Solution

The fourth proportional to 186,659.40, 279,916.30 and 81,406.60 is: 122,078.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,659.40 : 279,916.30 = 81,406.60 : x
  2. Step 2: Convert to fraction form
    186,659.40/279,916.30 = 81,406.60/x
  3. Step 3: Cross multiply
    186,659.40x = 279,916.30 × 81,406.60
  4. Step 4: Simplify right side
    186,659.40x = 22,787,034,267.58
  5. Step 5: Solve for x
    x = 22,787,034,267.58/186,659.40
  6. Step 6: Final answer
    x = 122,078.15

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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.