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Finding the Fourth Proportional to 223,411.45, 335,355.92 and 90,378.67

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Solution

The fourth proportional to 223,411.45, 335,355.92 and 90,378.67 is: 135,664.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,411.45 : 335,355.92 = 90,378.67 : x
  2. Step 2: Convert to fraction form
    223,411.45/335,355.92 = 90,378.67/x
  3. Step 3: Cross multiply
    223,411.45x = 335,355.92 × 90,378.67
  4. Step 4: Simplify right side
    223,411.45x = 30,309,019,897.55
  5. Step 5: Solve for x
    x = 30,309,019,897.55/223,411.45
  6. Step 6: Final answer
    x = 135,664.58

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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.