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Finding the Fourth Proportional to 136,021.70, 203,831.66 and 65,817.38

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Solution

The fourth proportional to 136,021.70, 203,831.66 and 65,817.38 is: 98,628.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,021.70 : 203,831.66 = 65,817.38 : x
  2. Step 2: Convert to fraction form
    136,021.70/203,831.66 = 65,817.38/x
  3. Step 3: Cross multiply
    136,021.70x = 203,831.66 × 65,817.38
  4. Step 4: Simplify right side
    136,021.70x = 13,415,665,822.25
  5. Step 5: Solve for x
    x = 13,415,665,822.25/136,021.70
  6. Step 6: Final answer
    x = 98,628.86

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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.