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Finding the Fourth Proportional to 268,390.50, 402,599.34 and 68,712.54

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Solution

The fourth proportional to 268,390.50, 402,599.34 and 68,712.54 is: 103,072.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,390.50 : 402,599.34 = 68,712.54 : x
  2. Step 2: Convert to fraction form
    268,390.50/402,599.34 = 68,712.54/x
  3. Step 3: Cross multiply
    268,390.50x = 402,599.34 × 68,712.54
  4. Step 4: Simplify right side
    268,390.50x = 27,663,623,253.72
  5. Step 5: Solve for x
    x = 27,663,623,253.72/268,390.50
  6. Step 6: Final answer
    x = 103,072.29

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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.