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Finding the Fourth Proportional to 207,687.11, 312,180.95 and 137,063.58

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Solution

The fourth proportional to 207,687.11, 312,180.95 and 137,063.58 is: 206,024.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,687.11 : 312,180.95 = 137,063.58 : x
  2. Step 2: Convert to fraction form
    207,687.11/312,180.95 = 137,063.58/x
  3. Step 3: Cross multiply
    207,687.11x = 312,180.95 × 137,063.58
  4. Step 4: Simplify right side
    207,687.11x = 42,788,637,786.78
  5. Step 5: Solve for x
    x = 42,788,637,786.78/207,687.11
  6. Step 6: Final answer
    x = 206,024.53

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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.