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Finding the Fourth Proportional to 73,110.60, 109,447.20 and 68,785.20

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Solution

The fourth proportional to 73,110.60, 109,447.20 and 68,785.20 is: 102,972.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,110.60 : 109,447.20 = 68,785.20 : x
  2. Step 2: Convert to fraction form
    73,110.60/109,447.20 = 68,785.20/x
  3. Step 3: Cross multiply
    73,110.60x = 109,447.20 × 68,785.20
  4. Step 4: Simplify right side
    73,110.60x = 7,528,347,541.44
  5. Step 5: Solve for x
    x = 7,528,347,541.44/73,110.60
  6. Step 6: Final answer
    x = 102,972.04

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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.