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Finding the Fourth Proportional to 68,812.71, 103,214.05 and 30,873.72

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Solution

The fourth proportional to 68,812.71, 103,214.05 and 30,873.72 is: 46,308.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,812.71 : 103,214.05 = 30,873.72 : x
  2. Step 2: Convert to fraction form
    68,812.71/103,214.05 = 30,873.72/x
  3. Step 3: Cross multiply
    68,812.71x = 103,214.05 × 30,873.72
  4. Step 4: Simplify right side
    68,812.71x = 3,186,601,679.77
  5. Step 5: Solve for x
    x = 3,186,601,679.77/68,812.71
  6. Step 6: Final answer
    x = 46,308.33

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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.