Home / 81,731.36-122,565.42-31,804.64

Finding the Fourth Proportional to 81,731.36, 122,565.42 and 31,804.64

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Solution

The fourth proportional to 81,731.36, 122,565.42 and 31,804.64 is: 47,694.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,731.36 : 122,565.42 = 31,804.64 : x
  2. Step 2: Convert to fraction form
    81,731.36/122,565.42 = 31,804.64/x
  3. Step 3: Cross multiply
    81,731.36x = 122,565.42 × 31,804.64
  4. Step 4: Simplify right side
    81,731.36x = 3,898,149,059.55
  5. Step 5: Solve for x
    x = 3,898,149,059.55/81,731.36
  6. Step 6: Final answer
    x = 47,694.66

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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.