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Finding the Fourth Proportional to 68,319.71, 102,446.72 and 38,729.60

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Solution

The fourth proportional to 68,319.71, 102,446.72 and 38,729.60 is: 58,075.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,319.71 : 102,446.72 = 38,729.60 : x
  2. Step 2: Convert to fraction form
    68,319.71/102,446.72 = 38,729.60/x
  3. Step 3: Cross multiply
    68,319.71x = 102,446.72 × 38,729.60
  4. Step 4: Simplify right side
    68,319.71x = 3,967,720,486.91
  5. Step 5: Solve for x
    x = 3,967,720,486.91/68,319.71
  6. Step 6: Final answer
    x = 58,075.78

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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.