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Finding the Fourth Proportional to 186,634.72, 279,820.82 and 86,688.80

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Solution

The fourth proportional to 186,634.72, 279,820.82 and 86,688.80 is: 129,972.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,634.72 : 279,820.82 = 86,688.80 : x
  2. Step 2: Convert to fraction form
    186,634.72/279,820.82 = 86,688.80/x
  3. Step 3: Cross multiply
    186,634.72x = 279,820.82 × 86,688.80
  4. Step 4: Simplify right side
    186,634.72x = 24,257,331,100.82
  5. Step 5: Solve for x
    x = 24,257,331,100.82/186,634.72
  6. Step 6: Final answer
    x = 129,972.23

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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.