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Finding the Fourth Proportional to 78,893.64, 108,872.51 and 43,083.54

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Solution

The fourth proportional to 78,893.64, 108,872.51 and 43,083.54 is: 59,454.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,893.64 : 108,872.51 = 43,083.54 : x
  2. Step 2: Convert to fraction form
    78,893.64/108,872.51 = 43,083.54/x
  3. Step 3: Cross multiply
    78,893.64x = 108,872.51 × 43,083.54
  4. Step 4: Simplify right side
    78,893.64x = 4,690,612,924.07
  5. Step 5: Solve for x
    x = 4,690,612,924.07/78,893.64
  6. Step 6: Final answer
    x = 59,454.89

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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.