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Finding the Fourth Proportional to 78,570.29, 108,351.62 and 52,787.09

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Solution

The fourth proportional to 78,570.29, 108,351.62 and 52,787.09 is: 72,795.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,570.29 : 108,351.62 = 52,787.09 : x
  2. Step 2: Convert to fraction form
    78,570.29/108,351.62 = 52,787.09/x
  3. Step 3: Cross multiply
    78,570.29x = 108,351.62 × 52,787.09
  4. Step 4: Simplify right side
    78,570.29x = 5,719,566,716.59
  5. Step 5: Solve for x
    x = 5,719,566,716.59/78,570.29
  6. Step 6: Final answer
    x = 72,795.54

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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.