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Finding the Fourth Proportional to 137,573.94, 206,360.90 and 90,815.88

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Solution

The fourth proportional to 137,573.94, 206,360.90 and 90,815.88 is: 136,223.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,573.94 : 206,360.90 = 90,815.88 : x
  2. Step 2: Convert to fraction form
    137,573.94/206,360.90 = 90,815.88/x
  3. Step 3: Cross multiply
    137,573.94x = 206,360.90 × 90,815.88
  4. Step 4: Simplify right side
    137,573.94x = 18,740,846,731.09
  5. Step 5: Solve for x
    x = 18,740,846,731.09/137,573.94
  6. Step 6: Final answer
    x = 136,223.81

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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.