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Finding the Fourth Proportional to 268,604.40, 402,862.78 and 79,020.41

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Solution

The fourth proportional to 268,604.40, 402,862.78 and 79,020.41 is: 118,517.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,604.40 : 402,862.78 = 79,020.41 : x
  2. Step 2: Convert to fraction form
    268,604.40/402,862.78 = 79,020.41/x
  3. Step 3: Cross multiply
    268,604.40x = 402,862.78 × 79,020.41
  4. Step 4: Simplify right side
    268,604.40x = 31,834,382,049.34
  5. Step 5: Solve for x
    x = 31,834,382,049.34/268,604.40
  6. Step 6: Final answer
    x = 118,517.72

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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.