Home / 81,732.36-122,566.92-31,805.64

Finding the Fourth Proportional to 81,732.36, 122,566.92 and 31,805.64

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Solution

The fourth proportional to 81,732.36, 122,566.92 and 31,805.64 is: 47,696.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,732.36 : 122,566.92 = 31,805.64 : x
  2. Step 2: Convert to fraction form
    81,732.36/122,566.92 = 31,805.64/x
  3. Step 3: Cross multiply
    81,732.36x = 122,566.92 × 31,805.64
  4. Step 4: Simplify right side
    81,732.36x = 3,898,319,333.43
  5. Step 5: Solve for x
    x = 3,898,319,333.43/81,732.36
  6. Step 6: Final answer
    x = 47,696.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.