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Finding the Fourth Proportional to 149,990.57, 206,990.25 and 89,549.94

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Solution

The fourth proportional to 149,990.57, 206,990.25 and 89,549.94 is: 123,580.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,990.57 : 206,990.25 = 89,549.94 : x
  2. Step 2: Convert to fraction form
    149,990.57/206,990.25 = 89,549.94/x
  3. Step 3: Cross multiply
    149,990.57x = 206,990.25 × 89,549.94
  4. Step 4: Simplify right side
    149,990.57x = 18,535,964,468.09
  5. Step 5: Solve for x
    x = 18,535,964,468.09/149,990.57
  6. Step 6: Final answer
    x = 123,580.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.