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Finding the Fourth Proportional to 74,942.38, 112,410.87 and 18,782.92

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Solution

The fourth proportional to 74,942.38, 112,410.87 and 18,782.92 is: 28,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,942.38 : 112,410.87 = 18,782.92 : x
  2. Step 2: Convert to fraction form
    74,942.38/112,410.87 = 18,782.92/x
  3. Step 3: Cross multiply
    74,942.38x = 112,410.87 × 18,782.92
  4. Step 4: Simplify right side
    74,942.38x = 2,111,404,378.34
  5. Step 5: Solve for x
    x = 2,111,404,378.34/74,942.38
  6. Step 6: Final answer
    x = 28,173.70

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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.