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Finding the Fourth Proportional to 255,930.36, 383,918.58 and 68,937.72

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Solution

The fourth proportional to 255,930.36, 383,918.58 and 68,937.72 is: 103,412.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,930.36 : 383,918.58 = 68,937.72 : x
  2. Step 2: Convert to fraction form
    255,930.36/383,918.58 = 68,937.72/x
  3. Step 3: Cross multiply
    255,930.36x = 383,918.58 × 68,937.72
  4. Step 4: Simplify right side
    255,930.36x = 26,466,471,570.84
  5. Step 5: Solve for x
    x = 26,466,471,570.84/255,930.36
  6. Step 6: Final answer
    x = 103,412.79

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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.