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Finding the Fourth Proportional to 259,364.43, 388,719.36 and 139,123.17

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Solution

The fourth proportional to 259,364.43, 388,719.36 and 139,123.17 is: 208,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,364.43 : 388,719.36 = 139,123.17 : x
  2. Step 2: Convert to fraction form
    259,364.43/388,719.36 = 139,123.17/x
  3. Step 3: Cross multiply
    259,364.43x = 388,719.36 × 139,123.17
  4. Step 4: Simplify right side
    259,364.43x = 54,079,869,603.57
  5. Step 5: Solve for x
    x = 54,079,869,603.57/259,364.43
  6. Step 6: Final answer
    x = 208,509.20

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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.