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Finding the Fourth Proportional to 268,506.38, 402,750.21 and 68,828.78

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Solution

The fourth proportional to 268,506.38, 402,750.21 and 68,828.78 is: 103,240.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,506.38 : 402,750.21 = 68,828.78 : x
  2. Step 2: Convert to fraction form
    268,506.38/402,750.21 = 68,828.78/x
  3. Step 3: Cross multiply
    268,506.38x = 402,750.21 × 68,828.78
  4. Step 4: Simplify right side
    268,506.38x = 27,720,805,599.04
  5. Step 5: Solve for x
    x = 27,720,805,599.04/268,506.38
  6. Step 6: Final answer
    x = 103,240.77

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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.