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Finding the Fourth Proportional to 139,307.36, 208,996.41 and 64,481.48

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Solution

The fourth proportional to 139,307.36, 208,996.41 and 64,481.48 is: 96,738.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,307.36 : 208,996.41 = 64,481.48 : x
  2. Step 2: Convert to fraction form
    139,307.36/208,996.41 = 64,481.48/x
  3. Step 3: Cross multiply
    139,307.36x = 208,996.41 × 64,481.48
  4. Step 4: Simplify right side
    139,307.36x = 13,476,397,831.49
  5. Step 5: Solve for x
    x = 13,476,397,831.49/139,307.36
  6. Step 6: Final answer
    x = 96,738.59

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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.