Home / 75,821.40-113,761.42-31,436.76

Finding the Fourth Proportional to 75,821.40, 113,761.42 and 31,436.76

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Solution

The fourth proportional to 75,821.40, 113,761.42 and 31,436.76 is: 47,167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,821.40 : 113,761.42 = 31,436.76 : x
  2. Step 2: Convert to fraction form
    75,821.40/113,761.42 = 31,436.76/x
  3. Step 3: Cross multiply
    75,821.40x = 113,761.42 × 31,436.76
  4. Step 4: Simplify right side
    75,821.40x = 3,576,290,457.80
  5. Step 5: Solve for x
    x = 3,576,290,457.80/75,821.40
  6. Step 6: Final answer
    x = 47,167.30

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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.