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Finding the Fourth Proportional to 276,685.80, 415,028.70 and 136,426.20

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Solution

The fourth proportional to 276,685.80, 415,028.70 and 136,426.20 is: 204,639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,685.80 : 415,028.70 = 136,426.20 : x
  2. Step 2: Convert to fraction form
    276,685.80/415,028.70 = 136,426.20/x
  3. Step 3: Cross multiply
    276,685.80x = 415,028.70 × 136,426.20
  4. Step 4: Simplify right side
    276,685.80x = 56,620,788,431.94
  5. Step 5: Solve for x
    x = 56,620,788,431.94/276,685.80
  6. Step 6: Final answer
    x = 204,639.30

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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.