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Finding the Fourth Proportional to 268,580.54, 402,879.81 and 81,591.50

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Solution

The fourth proportional to 268,580.54, 402,879.81 and 81,591.50 is: 122,389.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,580.54 : 402,879.81 = 81,591.50 : x
  2. Step 2: Convert to fraction form
    268,580.54/402,879.81 = 81,591.50/x
  3. Step 3: Cross multiply
    268,580.54x = 402,879.81 × 81,591.50
  4. Step 4: Simplify right side
    268,580.54x = 32,871,568,017.62
  5. Step 5: Solve for x
    x = 32,871,568,017.62/268,580.54
  6. Step 6: Final answer
    x = 122,389.98

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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.