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Finding the Fourth Proportional to 186,268, 279,207.50 and 86,345.80

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Solution

The fourth proportional to 186,268, 279,207.50 and 86,345.80 is: 129,428.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,268 : 279,207.50 = 86,345.80 : x
  2. Step 2: Convert to fraction form
    186,268/279,207.50 = 86,345.80/x
  3. Step 3: Cross multiply
    186,268x = 279,207.50 × 86,345.80
  4. Step 4: Simplify right side
    186,268x = 24,108,394,953.50
  5. Step 5: Solve for x
    x = 24,108,394,953.50/186,268
  6. Step 6: Final answer
    x = 129,428.54

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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.