Home / 137,904.98-207,168.87-81,781.90

Finding the Fourth Proportional to 137,904.98, 207,168.87 and 81,781.90

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Solution

The fourth proportional to 137,904.98, 207,168.87 and 81,781.90 is: 122,857.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,904.98 : 207,168.87 = 81,781.90 : x
  2. Step 2: Convert to fraction form
    137,904.98/207,168.87 = 81,781.90/x
  3. Step 3: Cross multiply
    137,904.98x = 207,168.87 × 81,781.90
  4. Step 4: Simplify right side
    137,904.98x = 16,942,664,221.76
  5. Step 5: Solve for x
    x = 16,942,664,221.76/137,904.98
  6. Step 6: Final answer
    x = 122,857.53

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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.