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Finding the Fourth Proportional to 137,575.93, 206,363.91 and 90,817.87

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Solution

The fourth proportional to 137,575.93, 206,363.91 and 90,817.87 is: 136,226.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,575.93 : 206,363.91 = 90,817.87 : x
  2. Step 2: Convert to fraction form
    137,575.93/206,363.91 = 90,817.87/x
  3. Step 3: Cross multiply
    137,575.93x = 206,363.91 × 90,817.87
  4. Step 4: Simplify right side
    137,575.93x = 18,741,530,751.07
  5. Step 5: Solve for x
    x = 18,741,530,751.07/137,575.93
  6. Step 6: Final answer
    x = 136,226.81

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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.