Home / 83,355.12-115,083.72-74,387.22

Finding the Fourth Proportional to 83,355.12, 115,083.72 and 74,387.22

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Solution

The fourth proportional to 83,355.12, 115,083.72 and 74,387.22 is: 102,702.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,355.12 : 115,083.72 = 74,387.22 : x
  2. Step 2: Convert to fraction form
    83,355.12/115,083.72 = 74,387.22/x
  3. Step 3: Cross multiply
    83,355.12x = 115,083.72 × 74,387.22
  4. Step 4: Simplify right side
    83,355.12x = 8,560,757,998.06
  5. Step 5: Solve for x
    x = 8,560,757,998.06/83,355.12
  6. Step 6: Final answer
    x = 102,702.25

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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.