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Finding the Fourth Proportional to 276,818.60, 415,228.18 and 77,139.56

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Solution

The fourth proportional to 276,818.60, 415,228.18 and 77,139.56 is: 115,709.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,818.60 : 415,228.18 = 77,139.56 : x
  2. Step 2: Convert to fraction form
    276,818.60/415,228.18 = 77,139.56/x
  3. Step 3: Cross multiply
    276,818.60x = 415,228.18 × 77,139.56
  4. Step 4: Simplify right side
    276,818.60x = 32,030,519,104.80
  5. Step 5: Solve for x
    x = 32,030,519,104.80/276,818.60
  6. Step 6: Final answer
    x = 115,709.42

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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.