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Finding the Fourth Proportional to 276,972.87, 415,515.20 and 87,462.84

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Solution

The fourth proportional to 276,972.87, 415,515.20 and 87,462.84 is: 131,211.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,972.87 : 415,515.20 = 87,462.84 : x
  2. Step 2: Convert to fraction form
    276,972.87/415,515.20 = 87,462.84/x
  3. Step 3: Cross multiply
    276,972.87x = 415,515.20 × 87,462.84
  4. Step 4: Simplify right side
    276,972.87x = 36,342,139,455.17
  5. Step 5: Solve for x
    x = 36,342,139,455.17/276,972.87
  6. Step 6: Final answer
    x = 131,211.91

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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.