Home / 137,390.58-206,088.71-90,305.89

Finding the Fourth Proportional to 137,390.58, 206,088.71 and 90,305.89

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Solution

The fourth proportional to 137,390.58, 206,088.71 and 90,305.89 is: 135,460.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,390.58 : 206,088.71 = 90,305.89 : x
  2. Step 2: Convert to fraction form
    137,390.58/206,088.71 = 90,305.89/x
  3. Step 3: Cross multiply
    137,390.58x = 206,088.71 × 90,305.89
  4. Step 4: Simplify right side
    137,390.58x = 18,611,023,408.75
  5. Step 5: Solve for x
    x = 18,611,023,408.75/137,390.58
  6. Step 6: Final answer
    x = 135,460.69

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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.