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Finding the Fourth Proportional to 186,645.79, 279,791.31 and 118,987.90

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Solution

The fourth proportional to 186,645.79, 279,791.31 and 118,987.90 is: 178,368.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,645.79 : 279,791.31 = 118,987.90 : x
  2. Step 2: Convert to fraction form
    186,645.79/279,791.31 = 118,987.90/x
  3. Step 3: Cross multiply
    186,645.79x = 279,791.31 × 118,987.90
  4. Step 4: Simplify right side
    186,645.79x = 33,291,780,415.15
  5. Step 5: Solve for x
    x = 33,291,780,415.15/186,645.79
  6. Step 6: Final answer
    x = 178,368.77

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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.