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Finding the Fourth Proportional to 100,758.33, 139,046.49 and 55,435.35

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Solution

The fourth proportional to 100,758.33, 139,046.49 and 55,435.35 is: 76,500.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,758.33 : 139,046.49 = 55,435.35 : x
  2. Step 2: Convert to fraction form
    100,758.33/139,046.49 = 55,435.35/x
  3. Step 3: Cross multiply
    100,758.33x = 139,046.49 × 55,435.35
  4. Step 4: Simplify right side
    100,758.33x = 7,708,090,839.42
  5. Step 5: Solve for x
    x = 7,708,090,839.42/100,758.33
  6. Step 6: Final answer
    x = 76,500.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.