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Finding the Fourth Proportional to 72,503.43, 108,798.21 and 39,222.77

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Solution

The fourth proportional to 72,503.43, 108,798.21 and 39,222.77 is: 58,857.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,503.43 : 108,798.21 = 39,222.77 : x
  2. Step 2: Convert to fraction form
    72,503.43/108,798.21 = 39,222.77/x
  3. Step 3: Cross multiply
    72,503.43x = 108,798.21 × 39,222.77
  4. Step 4: Simplify right side
    72,503.43x = 4,267,366,623.25
  5. Step 5: Solve for x
    x = 4,267,366,623.25/72,503.43
  6. Step 6: Final answer
    x = 58,857.44

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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.