Home / 81,082.53-111,970.89-76,664.79

Finding the Fourth Proportional to 81,082.53, 111,970.89 and 76,664.79

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Solution

The fourth proportional to 81,082.53, 111,970.89 and 76,664.79 is: 105,870.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,082.53 : 111,970.89 = 76,664.79 : x
  2. Step 2: Convert to fraction form
    81,082.53/111,970.89 = 76,664.79/x
  3. Step 3: Cross multiply
    81,082.53x = 111,970.89 × 76,664.79
  4. Step 4: Simplify right side
    81,082.53x = 8,584,224,767.96
  5. Step 5: Solve for x
    x = 8,584,224,767.96/81,082.53
  6. Step 6: Final answer
    x = 105,870.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.