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Finding the Fourth Proportional to 239,454.76, 359,286.54 and 128,517.16

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Solution

The fourth proportional to 239,454.76, 359,286.54 and 128,517.16 is: 192,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,454.76 : 359,286.54 = 128,517.16 : x
  2. Step 2: Convert to fraction form
    239,454.76/359,286.54 = 128,517.16/x
  3. Step 3: Cross multiply
    239,454.76x = 359,286.54 × 128,517.16
  4. Step 4: Simplify right side
    239,454.76x = 46,174,485,747.03
  5. Step 5: Solve for x
    x = 46,174,485,747.03/239,454.76
  6. Step 6: Final answer
    x = 192,831.77

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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.