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Finding the Fourth Proportional to 323,993.70, 486,061.60 and 99,370.98

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Solution

The fourth proportional to 323,993.70, 486,061.60 and 99,370.98 is: 149,078.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,993.70 : 486,061.60 = 99,370.98 : x
  2. Step 2: Convert to fraction form
    323,993.70/486,061.60 = 99,370.98/x
  3. Step 3: Cross multiply
    323,993.70x = 486,061.60 × 99,370.98
  4. Step 4: Simplify right side
    323,993.70x = 48,300,417,532.37
  5. Step 5: Solve for x
    x = 48,300,417,532.37/323,993.70
  6. Step 6: Final answer
    x = 149,078.26

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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.