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Finding the Fourth Proportional to 323,669.10, 485,502.84 and 87,011.76

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Solution

The fourth proportional to 323,669.10, 485,502.84 and 87,011.76 is: 130,517.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,669.10 : 485,502.84 = 87,011.76 : x
  2. Step 2: Convert to fraction form
    323,669.10/485,502.84 = 87,011.76/x
  3. Step 3: Cross multiply
    323,669.10x = 485,502.84 × 87,011.76
  4. Step 4: Simplify right side
    323,669.10x = 42,244,456,593.40
  5. Step 5: Solve for x
    x = 42,244,456,593.40/323,669.10
  6. Step 6: Final answer
    x = 130,517.42

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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.