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Finding the Fourth Proportional to 72,473.03, 100,013.78 and 43,788.68

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Solution

The fourth proportional to 72,473.03, 100,013.78 and 43,788.68 is: 60,428.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,473.03 : 100,013.78 = 43,788.68 : x
  2. Step 2: Convert to fraction form
    72,473.03/100,013.78 = 43,788.68/x
  3. Step 3: Cross multiply
    72,473.03x = 100,013.78 × 43,788.68
  4. Step 4: Simplify right side
    72,473.03x = 4,379,471,189.07
  5. Step 5: Solve for x
    x = 4,379,471,189.07/72,473.03
  6. Step 6: Final answer
    x = 60,428.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.