Home / 81,102.78-111,998.84-76,685.04

Finding the Fourth Proportional to 81,102.78, 111,998.84 and 76,685.04

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Solution

The fourth proportional to 81,102.78, 111,998.84 and 76,685.04 is: 105,898.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,102.78 : 111,998.84 = 76,685.04 : x
  2. Step 2: Convert to fraction form
    81,102.78/111,998.84 = 76,685.04/x
  3. Step 3: Cross multiply
    81,102.78x = 111,998.84 × 76,685.04
  4. Step 4: Simplify right side
    81,102.78x = 8,588,635,141.93
  5. Step 5: Solve for x
    x = 8,588,635,141.93/81,102.78
  6. Step 6: Final answer
    x = 105,898.16

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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.