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Finding the Fourth Proportional to 75,912.30, 113,868.45 and 40,920.30

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Solution

The fourth proportional to 75,912.30, 113,868.45 and 40,920.30 is: 61,380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,912.30 : 113,868.45 = 40,920.30 : x
  2. Step 2: Convert to fraction form
    75,912.30/113,868.45 = 40,920.30/x
  3. Step 3: Cross multiply
    75,912.30x = 113,868.45 × 40,920.30
  4. Step 4: Simplify right side
    75,912.30x = 4,659,531,134.54
  5. Step 5: Solve for x
    x = 4,659,531,134.54/75,912.30
  6. Step 6: Final answer
    x = 61,380.45

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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.