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Finding the Fourth Proportional to 73,317.54, 109,950.78 and 20,712.90

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Solution

The fourth proportional to 73,317.54, 109,950.78 and 20,712.90 is: 31,062.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,317.54 : 109,950.78 = 20,712.90 : x
  2. Step 2: Convert to fraction form
    73,317.54/109,950.78 = 20,712.90/x
  3. Step 3: Cross multiply
    73,317.54x = 109,950.78 × 20,712.90
  4. Step 4: Simplify right side
    73,317.54x = 2,277,399,511.06
  5. Step 5: Solve for x
    x = 2,277,399,511.06/73,317.54
  6. Step 6: Final answer
    x = 31,062.14

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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.