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Finding the Fourth Proportional to 279,513.45, 419,211.45 and 89,990.73

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Solution

The fourth proportional to 279,513.45, 419,211.45 and 89,990.73 is: 134,967.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,513.45 : 419,211.45 = 89,990.73 : x
  2. Step 2: Convert to fraction form
    279,513.45/419,211.45 = 89,990.73/x
  3. Step 3: Cross multiply
    279,513.45x = 419,211.45 × 89,990.73
  4. Step 4: Simplify right side
    279,513.45x = 37,725,144,409.86
  5. Step 5: Solve for x
    x = 37,725,144,409.86/279,513.45
  6. Step 6: Final answer
    x = 134,967.19

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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.