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Finding the Fourth Proportional to 186,649.79, 279,797.31 and 118,991.90

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Solution

The fourth proportional to 186,649.79, 279,797.31 and 118,991.90 is: 178,374.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,649.79 : 279,797.31 = 118,991.90 : x
  2. Step 2: Convert to fraction form
    186,649.79/279,797.31 = 118,991.90/x
  3. Step 3: Cross multiply
    186,649.79x = 279,797.31 × 118,991.90
  4. Step 4: Simplify right side
    186,649.79x = 33,293,613,531.79
  5. Step 5: Solve for x
    x = 33,293,613,531.79/186,649.79
  6. Step 6: Final answer
    x = 178,374.77

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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.