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Finding the Fourth Proportional to 136,998.06, 205,415.07 and 56,939.49

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Solution

The fourth proportional to 136,998.06, 205,415.07 and 56,939.49 is: 85,375.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,998.06 : 205,415.07 = 56,939.49 : x
  2. Step 2: Convert to fraction form
    136,998.06/205,415.07 = 56,939.49/x
  3. Step 3: Cross multiply
    136,998.06x = 205,415.07 × 56,939.49
  4. Step 4: Simplify right side
    136,998.06x = 11,696,229,324.11
  5. Step 5: Solve for x
    x = 11,696,229,324.11/136,998.06
  6. Step 6: Final answer
    x = 85,375.15

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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.