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Finding the Fourth Proportional to 78,876.81, 108,849.02 and 43,066.44

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Solution

The fourth proportional to 78,876.81, 108,849.02 and 43,066.44 is: 59,431.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,876.81 : 108,849.02 = 43,066.44 : x
  2. Step 2: Convert to fraction form
    78,876.81/108,849.02 = 43,066.44/x
  3. Step 3: Cross multiply
    78,876.81x = 108,849.02 × 43,066.44
  4. Step 4: Simplify right side
    78,876.81x = 4,687,739,573.56
  5. Step 5: Solve for x
    x = 4,687,739,573.56/78,876.81
  6. Step 6: Final answer
    x = 59,431.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.