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Finding the Fourth Proportional to 323,678.88, 485,507.39 and 87,009.03

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Solution

The fourth proportional to 323,678.88, 485,507.39 and 87,009.03 is: 130,510.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,678.88 : 485,507.39 = 87,009.03 : x
  2. Step 2: Convert to fraction form
    323,678.88/485,507.39 = 87,009.03/x
  3. Step 3: Cross multiply
    323,678.88x = 485,507.39 × 87,009.03
  4. Step 4: Simplify right side
    323,678.88x = 42,243,526,626.69
  5. Step 5: Solve for x
    x = 42,243,526,626.69/323,678.88
  6. Step 6: Final answer
    x = 130,510.61

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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.