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Finding the Fourth Proportional to 323,717.80, 485,558.79 and 99,078.07

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Solution

The fourth proportional to 323,717.80, 485,558.79 and 99,078.07 is: 148,611.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,717.80 : 485,558.79 = 99,078.07 : x
  2. Step 2: Convert to fraction form
    323,717.80/485,558.79 = 99,078.07/x
  3. Step 3: Cross multiply
    323,717.80x = 485,558.79 × 99,078.07
  4. Step 4: Simplify right side
    323,717.80x = 48,108,227,784.74
  5. Step 5: Solve for x
    x = 48,108,227,784.74/323,717.80
  6. Step 6: Final answer
    x = 148,611.62

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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.