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Finding the Fourth Proportional to 276,872.80, 415,309.20 and 136,904.80

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Solution

The fourth proportional to 276,872.80, 415,309.20 and 136,904.80 is: 205,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,872.80 : 415,309.20 = 136,904.80 : x
  2. Step 2: Convert to fraction form
    276,872.80/415,309.20 = 136,904.80/x
  3. Step 3: Cross multiply
    276,872.80x = 415,309.20 × 136,904.80
  4. Step 4: Simplify right side
    276,872.80x = 56,857,822,964.16
  5. Step 5: Solve for x
    x = 56,857,822,964.16/276,872.80
  6. Step 6: Final answer
    x = 205,357.20

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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.