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Finding the Fourth Proportional to 72,424.89, 108,640.58 and 19,833.21

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Solution

The fourth proportional to 72,424.89, 108,640.58 and 19,833.21 is: 29,750.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,424.89 : 108,640.58 = 19,833.21 : x
  2. Step 2: Convert to fraction form
    72,424.89/108,640.58 = 19,833.21/x
  3. Step 3: Cross multiply
    72,424.89x = 108,640.58 × 19,833.21
  4. Step 4: Simplify right side
    72,424.89x = 2,154,691,338.50
  5. Step 5: Solve for x
    x = 2,154,691,338.50/72,424.89
  6. Step 6: Final answer
    x = 29,750.70

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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.