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Finding the Fourth Proportional to 323,981.38, 485,916.68 and 87,268.70

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Solution

The fourth proportional to 323,981.38, 485,916.68 and 87,268.70 is: 130,888.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,981.38 : 485,916.68 = 87,268.70 : x
  2. Step 2: Convert to fraction form
    323,981.38/485,916.68 = 87,268.70/x
  3. Step 3: Cross multiply
    323,981.38x = 485,916.68 × 87,268.70
  4. Step 4: Simplify right side
    323,981.38x = 42,405,317,190.09
  5. Step 5: Solve for x
    x = 42,405,317,190.09/323,981.38
  6. Step 6: Final answer
    x = 130,888.13

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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.