Home / 81,982.89-123,112.58-77,774.13

Finding the Fourth Proportional to 81,982.89, 123,112.58 and 77,774.13

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Solution

The fourth proportional to 81,982.89, 123,112.58 and 77,774.13 is: 116,792.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,982.89 : 123,112.58 = 77,774.13 : x
  2. Step 2: Convert to fraction form
    81,982.89/123,112.58 = 77,774.13/x
  3. Step 3: Cross multiply
    81,982.89x = 123,112.58 × 77,774.13
  4. Step 4: Simplify right side
    81,982.89x = 9,574,973,412.68
  5. Step 5: Solve for x
    x = 9,574,973,412.68/81,982.89
  6. Step 6: Final answer
    x = 116,792.34

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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.