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Finding the Fourth Proportional to 207,235.20, 311,006.40 and 137,091.20

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Solution

The fourth proportional to 207,235.20, 311,006.40 and 137,091.20 is: 205,738.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,235.20 : 311,006.40 = 137,091.20 : x
  2. Step 2: Convert to fraction form
    207,235.20/311,006.40 = 137,091.20/x
  3. Step 3: Cross multiply
    207,235.20x = 311,006.40 × 137,091.20
  4. Step 4: Simplify right side
    207,235.20x = 42,636,240,583.68
  5. Step 5: Solve for x
    x = 42,636,240,583.68/207,235.20
  6. Step 6: Final answer
    x = 205,738.41

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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.