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Finding the Fourth Proportional to 186,679.32, 279,906.36 and 74,376.90

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Solution

The fourth proportional to 186,679.32, 279,906.36 and 74,376.90 is: 111,520.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,679.32 : 279,906.36 = 74,376.90 : x
  2. Step 2: Convert to fraction form
    186,679.32/279,906.36 = 74,376.90/x
  3. Step 3: Cross multiply
    186,679.32x = 279,906.36 × 74,376.90
  4. Step 4: Simplify right side
    186,679.32x = 20,818,567,347.08
  5. Step 5: Solve for x
    x = 20,818,567,347.08/186,679.32
  6. Step 6: Final answer
    x = 111,520.48

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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.