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Finding the Fourth Proportional to 137,873.60, 206,810.40 and 90,634.40

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Solution

The fourth proportional to 137,873.60, 206,810.40 and 90,634.40 is: 135,951.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,873.60 : 206,810.40 = 90,634.40 : x
  2. Step 2: Convert to fraction form
    137,873.60/206,810.40 = 90,634.40/x
  3. Step 3: Cross multiply
    137,873.60x = 206,810.40 × 90,634.40
  4. Step 4: Simplify right side
    137,873.60x = 18,744,136,517.76
  5. Step 5: Solve for x
    x = 18,744,136,517.76/137,873.60
  6. Step 6: Final answer
    x = 135,951.60

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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.