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Finding the Fourth Proportional to 268,099.93, 402,149.67 and 68,420.35

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Solution

The fourth proportional to 268,099.93, 402,149.67 and 68,420.35 is: 102,630.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,099.93 : 402,149.67 = 68,420.35 : x
  2. Step 2: Convert to fraction form
    268,099.93/402,149.67 = 68,420.35/x
  3. Step 3: Cross multiply
    268,099.93x = 402,149.67 × 68,420.35
  4. Step 4: Simplify right side
    268,099.93x = 27,515,221,173.78
  5. Step 5: Solve for x
    x = 27,515,221,173.78/268,099.93
  6. Step 6: Final answer
    x = 102,630.47

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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.