Home / 137,877.10-206,815.65-90,637.90

Finding the Fourth Proportional to 137,877.10, 206,815.65 and 90,637.90

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Solution

The fourth proportional to 137,877.10, 206,815.65 and 90,637.90 is: 135,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,877.10 : 206,815.65 = 90,637.90 : x
  2. Step 2: Convert to fraction form
    137,877.10/206,815.65 = 90,637.90/x
  3. Step 3: Cross multiply
    137,877.10x = 206,815.65 × 90,637.90
  4. Step 4: Simplify right side
    137,877.10x = 18,745,336,203.14
  5. Step 5: Solve for x
    x = 18,745,336,203.14/137,877.10
  6. Step 6: Final answer
    x = 135,956.85

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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.