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Finding the Fourth Proportional to 323,981.80, 485,917.32 and 87,269.12

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Solution

The fourth proportional to 323,981.80, 485,917.32 and 87,269.12 is: 130,888.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,981.80 : 485,917.32 = 87,269.12 : x
  2. Step 2: Convert to fraction form
    323,981.80/485,917.32 = 87,269.12/x
  3. Step 3: Cross multiply
    323,981.80x = 485,917.32 × 87,269.12
  4. Step 4: Simplify right side
    323,981.80x = 42,405,577,687.61
  5. Step 5: Solve for x
    x = 42,405,577,687.61/323,981.80
  6. Step 6: Final answer
    x = 130,888.76

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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.