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Finding the Fourth Proportional to 323,981.61, 485,917.03 and 87,268.94

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Solution

The fourth proportional to 323,981.61, 485,917.03 and 87,268.94 is: 130,888.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,981.61 : 485,917.03 = 87,268.94 : x
  2. Step 2: Convert to fraction form
    323,981.61/485,917.03 = 87,268.94/x
  3. Step 3: Cross multiply
    323,981.61x = 485,917.03 × 87,268.94
  4. Step 4: Simplify right side
    323,981.61x = 42,405,461,815.55
  5. Step 5: Solve for x
    x = 42,405,461,815.55/323,981.61
  6. Step 6: Final answer
    x = 130,888.48

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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.