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Finding the Fourth Proportional to 72,520.92, 108,772.07 and 19,934.51

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Solution

The fourth proportional to 72,520.92, 108,772.07 and 19,934.51 is: 29,899.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,520.92 : 108,772.07 = 19,934.51 : x
  2. Step 2: Convert to fraction form
    72,520.92/108,772.07 = 19,934.51/x
  3. Step 3: Cross multiply
    72,520.92x = 108,772.07 × 19,934.51
  4. Step 4: Simplify right side
    72,520.92x = 2,168,317,273.60
  5. Step 5: Solve for x
    x = 2,168,317,273.60/72,520.92
  6. Step 6: Final answer
    x = 29,899.20

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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.