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Finding the Fourth Proportional to 223,409.20, 335,352.54 and 90,376.42

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Solution

The fourth proportional to 223,409.20, 335,352.54 and 90,376.42 is: 135,661.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,409.20 : 335,352.54 = 90,376.42 : x
  2. Step 2: Convert to fraction form
    223,409.20/335,352.54 = 90,376.42/x
  3. Step 3: Cross multiply
    223,409.20x = 335,352.54 × 90,376.42
  4. Step 4: Simplify right side
    223,409.20x = 30,307,962,003.11
  5. Step 5: Solve for x
    x = 30,307,962,003.11/223,409.20
  6. Step 6: Final answer
    x = 135,661.21

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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.