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Finding the Fourth Proportional to 279,127.92, 418,661.04 and 76,739.84

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Solution

The fourth proportional to 279,127.92, 418,661.04 and 76,739.84 is: 115,101.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,127.92 : 418,661.04 = 76,739.84 : x
  2. Step 2: Convert to fraction form
    279,127.92/418,661.04 = 76,739.84/x
  3. Step 3: Cross multiply
    279,127.92x = 418,661.04 × 76,739.84
  4. Step 4: Simplify right side
    279,127.92x = 32,127,981,223.83
  5. Step 5: Solve for x
    x = 32,127,981,223.83/279,127.92
  6. Step 6: Final answer
    x = 115,101.28

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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.