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Finding the Fourth Proportional to 72,445.70, 108,668.55 and 68,363.30

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Solution

The fourth proportional to 72,445.70, 108,668.55 and 68,363.30 is: 102,544.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,445.70 : 108,668.55 = 68,363.30 : x
  2. Step 2: Convert to fraction form
    72,445.70/108,668.55 = 68,363.30/x
  3. Step 3: Cross multiply
    72,445.70x = 108,668.55 × 68,363.30
  4. Step 4: Simplify right side
    72,445.70x = 7,428,940,684.22
  5. Step 5: Solve for x
    x = 7,428,940,684.22/72,445.70
  6. Step 6: Final answer
    x = 102,544.95

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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.