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Finding the Fourth Proportional to 268,604.15, 402,862.40 and 79,020.16

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Solution

The fourth proportional to 268,604.15, 402,862.40 and 79,020.16 is: 118,517.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,604.15 : 402,862.40 = 79,020.16 : x
  2. Step 2: Convert to fraction form
    268,604.15/402,862.40 = 79,020.16/x
  3. Step 3: Cross multiply
    268,604.15x = 402,862.40 × 79,020.16
  4. Step 4: Simplify right side
    268,604.15x = 31,834,251,305.98
  5. Step 5: Solve for x
    x = 31,834,251,305.98/268,604.15
  6. Step 6: Final answer
    x = 118,517.35

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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.