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Finding the Fourth Proportional to 323,920.53, 485,974.19 and 99,314.12

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Solution

The fourth proportional to 323,920.53, 485,974.19 and 99,314.12 is: 148,999.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,920.53 : 485,974.19 = 99,314.12 : x
  2. Step 2: Convert to fraction form
    323,920.53/485,974.19 = 99,314.12/x
  3. Step 3: Cross multiply
    323,920.53x = 485,974.19 × 99,314.12
  4. Step 4: Simplify right side
    323,920.53x = 48,264,096,096.12
  5. Step 5: Solve for x
    x = 48,264,096,096.12/323,920.53
  6. Step 6: Final answer
    x = 148,999.81

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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.