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Finding the Fourth Proportional to 74,863.80, 112,198.30 and 30,438.76

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Solution

The fourth proportional to 74,863.80, 112,198.30 and 30,438.76 is: 45,618.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,863.80 : 112,198.30 = 30,438.76 : x
  2. Step 2: Convert to fraction form
    74,863.80/112,198.30 = 30,438.76/x
  3. Step 3: Cross multiply
    74,863.80x = 112,198.30 × 30,438.76
  4. Step 4: Simplify right side
    74,863.80x = 3,415,177,126.11
  5. Step 5: Solve for x
    x = 3,415,177,126.11/74,863.80
  6. Step 6: Final answer
    x = 45,618.54

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1.5x scale

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.