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Finding the Fourth Proportional to 81,905.65, 122,858.33 and 25,750.65

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Solution

The fourth proportional to 81,905.65, 122,858.33 and 25,750.65 is: 38,625.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,905.65 : 122,858.33 = 25,750.65 : x
  2. Step 2: Convert to fraction form
    81,905.65/122,858.33 = 25,750.65/x
  3. Step 3: Cross multiply
    81,905.65x = 122,858.33 × 25,750.65
  4. Step 4: Simplify right side
    81,905.65x = 3,163,682,187.38
  5. Step 5: Solve for x
    x = 3,163,682,187.38/81,905.65
  6. Step 6: Final answer
    x = 38,625.93

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1.5x scale

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.