Home / 81,917.61-122,876.31-25,762.65

Finding the Fourth Proportional to 81,917.61, 122,876.31 and 25,762.65

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Solution

The fourth proportional to 81,917.61, 122,876.31 and 25,762.65 is: 38,643.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,917.61 : 122,876.31 = 25,762.65 : x
  2. Step 2: Convert to fraction form
    81,917.61/122,876.31 = 25,762.65/x
  3. Step 3: Cross multiply
    81,917.61x = 122,876.31 × 25,762.65
  4. Step 4: Simplify right side
    81,917.61x = 3,165,619,367.82
  5. Step 5: Solve for x
    x = 3,165,619,367.82/81,917.61
  6. Step 6: Final answer
    x = 38,643.94

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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.