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Finding the Fourth Proportional to 68,318.71, 102,445.22 and 38,728.60

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Solution

The fourth proportional to 68,318.71, 102,445.22 and 38,728.60 is: 58,074.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,318.71 : 102,445.22 = 38,728.60 : x
  2. Step 2: Convert to fraction form
    68,318.71/102,445.22 = 38,728.60/x
  3. Step 3: Cross multiply
    68,318.71x = 102,445.22 × 38,728.60
  4. Step 4: Simplify right side
    68,318.71x = 3,967,559,788.00
  5. Step 5: Solve for x
    x = 3,967,559,788.00/68,318.71
  6. Step 6: Final answer
    x = 58,074.28

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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.