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Finding the Fourth Proportional to 73,112.80, 109,669.20 and 38,047.90

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Solution

The fourth proportional to 73,112.80, 109,669.20 and 38,047.90 is: 57,071.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,112.80 : 109,669.20 = 38,047.90 : x
  2. Step 2: Convert to fraction form
    73,112.80/109,669.20 = 38,047.90/x
  3. Step 3: Cross multiply
    73,112.80x = 109,669.20 × 38,047.90
  4. Step 4: Simplify right side
    73,112.80x = 4,172,682,754.68
  5. Step 5: Solve for x
    x = 4,172,682,754.68/73,112.80
  6. Step 6: Final answer
    x = 57,071.85

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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.