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Finding the Fourth Proportional to 83,612.88, 115,375.56 and 61,218

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Solution

The fourth proportional to 83,612.88, 115,375.56 and 61,218 is: 84,473.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,612.88 : 115,375.56 = 61,218 : x
  2. Step 2: Convert to fraction form
    83,612.88/115,375.56 = 61,218/x
  3. Step 3: Cross multiply
    83,612.88x = 115,375.56 × 61,218
  4. Step 4: Simplify right side
    83,612.88x = 7,063,061,032.08
  5. Step 5: Solve for x
    x = 7,063,061,032.08/83,612.88
  6. Step 6: Final answer
    x = 84,473.36

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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.