Home / 52,082.28-78,123.40-12,639.04

Finding the Fourth Proportional to 52,082.28, 78,123.40 and 12,639.04

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Solution

The fourth proportional to 52,082.28, 78,123.40 and 12,639.04 is: 18,958.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,082.28 : 78,123.40 = 12,639.04 : x
  2. Step 2: Convert to fraction form
    52,082.28/78,123.40 = 12,639.04/x
  3. Step 3: Cross multiply
    52,082.28x = 78,123.40 × 12,639.04
  4. Step 4: Simplify right side
    52,082.28x = 987,404,777.54
  5. Step 5: Solve for x
    x = 987,404,777.54/52,082.28
  6. Step 6: Final answer
    x = 18,958.56

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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.