Home / 71,912.81-99,240.16-40,083.79

Finding the Fourth Proportional to 71,912.81, 99,240.16 and 40,083.79

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Solution

The fourth proportional to 71,912.81, 99,240.16 and 40,083.79 is: 55,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,912.81 : 99,240.16 = 40,083.79 : x
  2. Step 2: Convert to fraction form
    71,912.81/99,240.16 = 40,083.79/x
  3. Step 3: Cross multiply
    71,912.81x = 99,240.16 × 40,083.79
  4. Step 4: Simplify right side
    71,912.81x = 3,977,921,236.81
  5. Step 5: Solve for x
    x = 3,977,921,236.81/71,912.81
  6. Step 6: Final answer
    x = 55,315.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.