Home / 259,123.14-388,665.96-81,680.94

Finding the Fourth Proportional to 259,123.14, 388,665.96 and 81,680.94

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Solution

The fourth proportional to 259,123.14, 388,665.96 and 81,680.94 is: 122,515.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,123.14 : 388,665.96 = 81,680.94 : x
  2. Step 2: Convert to fraction form
    259,123.14/388,665.96 = 81,680.94/x
  3. Step 3: Cross multiply
    259,123.14x = 388,665.96 × 81,680.94
  4. Step 4: Simplify right side
    259,123.14x = 31,746,600,958.80
  5. Step 5: Solve for x
    x = 31,746,600,958.80/259,123.14
  6. Step 6: Final answer
    x = 122,515.50

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1.5x scale

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.