Home / 81,815.85-112,961.79-62,661.78

Finding the Fourth Proportional to 81,815.85, 112,961.79 and 62,661.78

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Solution

The fourth proportional to 81,815.85, 112,961.79 and 62,661.78 is: 86,516.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,815.85 : 112,961.79 = 62,661.78 : x
  2. Step 2: Convert to fraction form
    81,815.85/112,961.79 = 62,661.78/x
  3. Step 3: Cross multiply
    81,815.85x = 112,961.79 × 62,661.78
  4. Step 4: Simplify right side
    81,815.85x = 7,078,386,833.39
  5. Step 5: Solve for x
    x = 7,078,386,833.39/81,815.85
  6. Step 6: Final answer
    x = 86,516.08

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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.