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Finding the Fourth Proportional to 268,465.84, 402,689.46 and 68,787.88

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Solution

The fourth proportional to 268,465.84, 402,689.46 and 68,787.88 is: 103,179.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,465.84 : 402,689.46 = 68,787.88 : x
  2. Step 2: Convert to fraction form
    268,465.84/402,689.46 = 68,787.88/x
  3. Step 3: Cross multiply
    268,465.84x = 402,689.46 × 68,787.88
  4. Step 4: Simplify right side
    268,465.84x = 27,700,154,251.74
  5. Step 5: Solve for x
    x = 27,700,154,251.74/268,465.84
  6. Step 6: Final answer
    x = 103,179.44

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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.