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Finding the Fourth Proportional to 124,787.28, 172,206.03 and 68,198.64

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Solution

The fourth proportional to 124,787.28, 172,206.03 and 68,198.64 is: 94,113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,787.28 : 172,206.03 = 68,198.64 : x
  2. Step 2: Convert to fraction form
    124,787.28/172,206.03 = 68,198.64/x
  3. Step 3: Cross multiply
    124,787.28x = 172,206.03 × 68,198.64
  4. Step 4: Simplify right side
    124,787.28x = 11,744,217,045.80
  5. Step 5: Solve for x
    x = 11,744,217,045.80/124,787.28
  6. Step 6: Final answer
    x = 94,113.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.