Home / 81,795.61-122,693.49-25,640.11

Finding the Fourth Proportional to 81,795.61, 122,693.49 and 25,640.11

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Solution

The fourth proportional to 81,795.61, 122,693.49 and 25,640.11 is: 38,460.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,795.61 : 122,693.49 = 25,640.11 : x
  2. Step 2: Convert to fraction form
    81,795.61/122,693.49 = 25,640.11/x
  3. Step 3: Cross multiply
    81,795.61x = 122,693.49 × 25,640.11
  4. Step 4: Simplify right side
    81,795.61x = 3,145,874,579.88
  5. Step 5: Solve for x
    x = 3,145,874,579.88/81,795.61
  6. Step 6: Final answer
    x = 38,460.19

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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.